diff --git a/.gitea/workflows/busybox.yml b/.gitea/workflows/busybox.yml
new file mode 100644
index 0000000..4000465
--- /dev/null
+++ b/.gitea/workflows/busybox.yml
@@ -0,0 +1,68 @@
+name: busybox static musl build
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - .gitea/workflows/busybox.yml
+      - scripts/build_busybox.sh
+      - scripts/publish_release.py
+      - versions/busybox.version
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-release:
+    runs-on: alpine-latest
+
+    steps:
+      - name: Bootstrap workspace
+        shell: sh
+        env:
+          REPO_URL: ${{ gitea.server_url }}
+          REPO_NAME: ${{ gitea.repository }}
+          GIT_SHA: ${{ gitea.sha }}
+        run: |
+          apk add --no-cache git
+          workdir="$(pwd)"
+          tmpdir="$(mktemp -d)"
+          git clone --depth 1 "$REPO_URL/$REPO_NAME.git" "$tmpdir/repo"
+          git -C "$tmpdir/repo" fetch --depth 1 origin "$GIT_SHA"
+          git -C "$tmpdir/repo" checkout "$GIT_SHA"
+          find "$workdir" -mindepth 1 -maxdepth 1 -exec rm -rf {} +
+          cp -a "$tmpdir/repo"/. "$workdir"/
+
+      - name: Read version
+        id: meta
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          version="$(tr -d ' \n\r' < versions/busybox.version)"
+          artifact="busybox-${version}-linux-amd64-musl-static"
+          echo "version=${version}" >> "$GITHUB_OUTPUT"
+          echo "artifact=${artifact}" >> "$GITHUB_OUTPUT"
+
+      - name: Build static busybox
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          chmod +x scripts/build_busybox.sh
+          ./scripts/build_busybox.sh "${{ steps.meta.outputs.version }}" "$PWD/dist"
+
+      - name: Publish release assets
+        shell: sh
+        env:
+          GITEA_TOKEN: ${{ gitea.token }}
+          GITEA_API_URL: ${{ gitea.api_url }}
+          REPO_OWNER: ${{ gitea.repository_owner }}
+          REPO_NAME: static-musl-builds
+          TOOL: busybox
+          VERSION: ${{ steps.meta.outputs.version }}
+          TARGET_SHA: ${{ gitea.sha }}
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          apk add --no-cache python3
+          python3 scripts/publish_release.py             "dist/${{ steps.meta.outputs.artifact }}"             "dist/${{ steps.meta.outputs.artifact }}.tar.gz"             "dist/${{ steps.meta.outputs.artifact }}.sha256"
diff --git a/.gitea/workflows/doggo.yml b/.gitea/workflows/doggo.yml
new file mode 100644
index 0000000..fa9c2e7
--- /dev/null
+++ b/.gitea/workflows/doggo.yml
@@ -0,0 +1,68 @@
+name: doggo static musl build
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - .gitea/workflows/doggo.yml
+      - scripts/build_doggo.sh
+      - scripts/publish_release.py
+      - versions/doggo.version
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-release:
+    runs-on: alpine-latest
+
+    steps:
+      - name: Bootstrap workspace
+        shell: sh
+        env:
+          REPO_URL: ${{ gitea.server_url }}
+          REPO_NAME: ${{ gitea.repository }}
+          GIT_SHA: ${{ gitea.sha }}
+        run: |
+          apk add --no-cache git
+          workdir="$(pwd)"
+          tmpdir="$(mktemp -d)"
+          git clone --depth 1 "$REPO_URL/$REPO_NAME.git" "$tmpdir/repo"
+          git -C "$tmpdir/repo" fetch --depth 1 origin "$GIT_SHA"
+          git -C "$tmpdir/repo" checkout "$GIT_SHA"
+          find "$workdir" -mindepth 1 -maxdepth 1 -exec rm -rf {} +
+          cp -a "$tmpdir/repo"/. "$workdir"/
+
+      - name: Read version
+        id: meta
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          version="$(tr -d ' \n\r' < versions/doggo.version)"
+          artifact="doggo-${version}-linux-amd64-musl-static"
+          echo "version=${version}" >> "$GITHUB_OUTPUT"
+          echo "artifact=${artifact}" >> "$GITHUB_OUTPUT"
+
+      - name: Build static doggo
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          chmod +x scripts/build_doggo.sh
+          ./scripts/build_doggo.sh "${{ steps.meta.outputs.version }}" "$PWD/dist"
+
+      - name: Publish release assets
+        shell: sh
+        env:
+          GITEA_TOKEN: ${{ gitea.token }}
+          GITEA_API_URL: ${{ gitea.api_url }}
+          REPO_OWNER: ${{ gitea.repository_owner }}
+          REPO_NAME: static-musl-builds
+          TOOL: doggo
+          VERSION: ${{ steps.meta.outputs.version }}
+          TARGET_SHA: ${{ gitea.sha }}
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          apk add --no-cache python3
+          python3 scripts/publish_release.py             "dist/${{ steps.meta.outputs.artifact }}"             "dist/${{ steps.meta.outputs.artifact }}.tar.gz"             "dist/${{ steps.meta.outputs.artifact }}.sha256"
diff --git a/.gitea/workflows/gdu.yml b/.gitea/workflows/gdu.yml
index 07875a2..54aae08 100644
--- a/.gitea/workflows/gdu.yml
+++ b/.gitea/workflows/gdu.yml
@@ -7,6 +7,7 @@ on:
     paths:
       - .gitea/workflows/gdu.yml
       - scripts/build_gdu.sh
+      - scripts/publish_release.py
       - versions/gdu.version
   workflow_dispatch:
 
diff --git a/.gitea/workflows/speedtest-go.yml b/.gitea/workflows/speedtest-go.yml
new file mode 100644
index 0000000..7852dee
--- /dev/null
+++ b/.gitea/workflows/speedtest-go.yml
@@ -0,0 +1,68 @@
+name: speedtest-go static musl build
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - .gitea/workflows/speedtest-go.yml
+      - scripts/build_speedtest-go.sh
+      - scripts/publish_release.py
+      - versions/speedtest-go.version
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-release:
+    runs-on: alpine-latest
+
+    steps:
+      - name: Bootstrap workspace
+        shell: sh
+        env:
+          REPO_URL: ${{ gitea.server_url }}
+          REPO_NAME: ${{ gitea.repository }}
+          GIT_SHA: ${{ gitea.sha }}
+        run: |
+          apk add --no-cache git
+          workdir="$(pwd)"
+          tmpdir="$(mktemp -d)"
+          git clone --depth 1 "$REPO_URL/$REPO_NAME.git" "$tmpdir/repo"
+          git -C "$tmpdir/repo" fetch --depth 1 origin "$GIT_SHA"
+          git -C "$tmpdir/repo" checkout "$GIT_SHA"
+          find "$workdir" -mindepth 1 -maxdepth 1 -exec rm -rf {} +
+          cp -a "$tmpdir/repo"/. "$workdir"/
+
+      - name: Read version
+        id: meta
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          version="$(tr -d ' \n\r' < versions/speedtest-go.version)"
+          artifact="speedtest-go-${version}-linux-amd64-musl-static"
+          echo "version=${version}" >> "$GITHUB_OUTPUT"
+          echo "artifact=${artifact}" >> "$GITHUB_OUTPUT"
+
+      - name: Build static speedtest-go
+        shell: sh
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          chmod +x scripts/build_speedtest-go.sh
+          ./scripts/build_speedtest-go.sh "${{ steps.meta.outputs.version }}" "$PWD/dist"
+
+      - name: Publish release assets
+        shell: sh
+        env:
+          GITEA_TOKEN: ${{ gitea.token }}
+          GITEA_API_URL: ${{ gitea.api_url }}
+          REPO_OWNER: ${{ gitea.repository_owner }}
+          REPO_NAME: static-musl-builds
+          TOOL: speedtest-go
+          VERSION: ${{ steps.meta.outputs.version }}
+          TARGET_SHA: ${{ gitea.sha }}
+        working-directory: ${{ gitea.workspace }}
+        run: |
+          apk add --no-cache python3
+          python3 scripts/publish_release.py             "dist/${{ steps.meta.outputs.artifact }}"             "dist/${{ steps.meta.outputs.artifact }}.tar.gz"             "dist/${{ steps.meta.outputs.artifact }}.sha256"
diff --git a/README.md b/README.md
index 1b3cfcf..5efde73 100644
--- a/README.md
+++ b/README.md
@@ -2,50 +2,16 @@
 
 Automated static `musl` builds for portable Linux binaries.
 
-Current target:
-- `iperf3` (x86_64 / amd64)
+## Tools
+- `iperf3`
+- `gdu`
+- `speedtest-go`
+- `doggo`
+- `busybox`
 
-## What this repo does
+Each release publishes:
+- the raw binary
+- a `.tar.gz`
+- a `.sha256`
 
-- Tracks a pinned upstream version in `versions/`
-- Builds a fully static `musl` binary with Gitea Actions
-- Publishes versioned release assets to Gitea Releases
-- Is designed to grow with more binaries later
-
-## Current output
-
-For each `iperf3` release build, the workflow publishes:
-- `iperf3-<version>-linux-amd64-musl-static`
-- `iperf3-<version>-linux-amd64-musl-static.tar.gz`
-- `iperf3-<version>-linux-amd64-musl-static.sha256`
-
-## Repo layout
-
-- `versions/iperf3.version` — tracked upstream version
-- `scripts/build_iperf3.sh` — static build script
-- `scripts/sync_iperf3_version.py` — checks upstream and updates pinned version
-- `scripts/publish_release.py` — idempotent release asset publisher for Gitea
-- `.gitea/workflows/iperf3.yml` — CI pipeline
-
-## How updates happen
-
-1. `scripts/sync_iperf3_version.py` checks the latest upstream iperf3 release.
-2. If a newer version exists, it updates `versions/iperf3.version`.
-3. A commit is pushed.
-4. Gitea Actions builds the static binary and uploads release assets.
-
-## Manual local update example
-
-```bash
-python3 scripts/sync_iperf3_version.py --update-file
-if ! git diff --quiet -- versions/iperf3.version; then
-  git add versions/iperf3.version
-  git commit -m "chore(iperf3): bump to $(cat versions/iperf3.version)"
-  git push
-fi
-```
-
-## Notes
-
-- The current workflow targets `amd64` first because that is the most broadly useful Linux target.
-- The structure is intentionally generic so more binaries can be added later without reworking the repo.
+Versions are pinned in `versions/*.version` and refreshed by cron. Matching Gitea Actions workflows build and publish updated releases automatically.
diff --git a/scripts/build_busybox.sh b/scripts/build_busybox.sh
new file mode 100755
index 0000000..cc68867
--- /dev/null
+++ b/scripts/build_busybox.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+set -eu
+
+VERSION="${1:?usage: build_busybox.sh <version> [output_dir]}"
+OUTPUT_DIR="${2:-$PWD/dist}"
+PREFIX_NAME="busybox-${VERSION}-linux-amd64-musl-static"
+
+mkdir -p "$OUTPUT_DIR"
+
+apk add --no-cache   build-base   bzip2   curl   file   tar   xz
+
+SRCDIR="${TMPDIR:-/tmp}/busybox-src-${VERSION}"
+rm -rf "$SRCDIR"
+mkdir -p "$SRCDIR"
+
+curl -fsSL "https://busybox.net/downloads/busybox-${VERSION}.tar.bz2"   | tar -xj -C "$SRCDIR" --strip-components=1
+
+cd "$SRCDIR"
+make defconfig >/dev/null
+
+set_kconfig() {
+  key="$1"
+  value="$2"
+  if grep -q "^${key}=" .config; then
+    sed -i "s#^${key}=.*#${key}=${value}#" .config
+  elif grep -q "^# ${key} is not set$" .config; then
+    sed -i "s|^# ${key} is not set$|${key}=${value}|" .config
+  else
+    echo "${key}=${value}" >> .config
+  fi
+}
+
+set_kconfig CONFIG_STATIC y
+set_kconfig CONFIG_FEATURE_SEAMLESS_XZ y
+set_kconfig CONFIG_FEATURE_SEAMLESS_BZ2 y
+set_kconfig CONFIG_UNXZ y
+set_kconfig CONFIG_XZ y
+set_kconfig CONFIG_BZIP2 y
+set_kconfig CONFIG_UNZIP y
+
+yes '' | make oldconfig >/dev/null
+make -j"$(getconf _NPROCESSORS_ONLN 2>/dev/null || echo 2)" busybox
+cp busybox "$OUTPUT_DIR/$PREFIX_NAME"
+strip "$OUTPUT_DIR/$PREFIX_NAME" 2>/dev/null || true
+
+(
+  cd "$OUTPUT_DIR"
+  tar -czf "${PREFIX_NAME}.tar.gz" "$PREFIX_NAME"
+  sha256sum "$PREFIX_NAME" "${PREFIX_NAME}.tar.gz" > "${PREFIX_NAME}.sha256"
+)
+
+file "$OUTPUT_DIR/$PREFIX_NAME"
+ldd "$OUTPUT_DIR/$PREFIX_NAME" || true
+
+if file "$OUTPUT_DIR/$PREFIX_NAME" | grep -qi 'dynamically linked'; then
+  echo "error: output binary is still dynamically linked" >&2
+  exit 1
+fi
+
+echo "build OK: $OUTPUT_DIR/$PREFIX_NAME"
diff --git a/scripts/build_doggo.sh b/scripts/build_doggo.sh
new file mode 100755
index 0000000..6045fa4
--- /dev/null
+++ b/scripts/build_doggo.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+set -eu
+
+VERSION="${1:?usage: build_doggo.sh <version> [output_dir]}"
+OUTPUT_DIR="${2:-$PWD/dist}"
+VERSION="${VERSION#v}"
+PREFIX_NAME="doggo-${VERSION}-linux-amd64-musl-static"
+
+mkdir -p "$OUTPUT_DIR"
+
+apk add --no-cache   curl   file   go   git   tar   xz
+
+SRCDIR="${TMPDIR:-/tmp}/doggo-src-${VERSION}"
+rm -rf "$SRCDIR"
+mkdir -p "$SRCDIR"
+
+curl -fsSL "https://github.com/mr-karan/doggo/archive/refs/tags/v${VERSION}.tar.gz"   | tar -xz -C "$SRCDIR" --strip-components=1
+
+cd "$SRCDIR"
+CGO_ENABLED=0 GOARCH=amd64 GOOS=linux   go build     -trimpath     -ldflags="-s -w -extldflags=-static"     -o "$OUTPUT_DIR/$PREFIX_NAME"     ./cmd/doggo
+
+strip "$OUTPUT_DIR/$PREFIX_NAME" 2>/dev/null || true
+
+(
+  cd "$OUTPUT_DIR"
+  tar -czf "${PREFIX_NAME}.tar.gz" "$PREFIX_NAME"
+  sha256sum "$PREFIX_NAME" "${PREFIX_NAME}.tar.gz" > "${PREFIX_NAME}.sha256"
+)
+
+file "$OUTPUT_DIR/$PREFIX_NAME"
+ldd "$OUTPUT_DIR/$PREFIX_NAME" || true
+
+if file "$OUTPUT_DIR/$PREFIX_NAME" | grep -qi 'dynamically linked'; then
+  echo "error: output binary is still dynamically linked" >&2
+  exit 1
+fi
+
+echo "build OK: $OUTPUT_DIR/$PREFIX_NAME"
diff --git a/scripts/build_speedtest-go.sh b/scripts/build_speedtest-go.sh
new file mode 100755
index 0000000..d0c3bc7
--- /dev/null
+++ b/scripts/build_speedtest-go.sh
@@ -0,0 +1,38 @@
+#!/bin/sh
+set -eu
+
+VERSION="${1:?usage: build_speedtest-go.sh <version> [output_dir]}"
+OUTPUT_DIR="${2:-$PWD/dist}"
+VERSION="${VERSION#v}"
+PREFIX_NAME="speedtest-go-${VERSION}-linux-amd64-musl-static"
+
+mkdir -p "$OUTPUT_DIR"
+
+apk add --no-cache   curl   file   go   git   tar   xz
+
+SRCDIR="${TMPDIR:-/tmp}/speedtest-go-src-${VERSION}"
+rm -rf "$SRCDIR"
+mkdir -p "$SRCDIR"
+
+curl -fsSL "https://github.com/showwin/speedtest-go/archive/refs/tags/v${VERSION}.tar.gz"   | tar -xz -C "$SRCDIR" --strip-components=1
+
+cd "$SRCDIR"
+CGO_ENABLED=0 GOARCH=amd64 GOOS=linux   go build     -trimpath     -ldflags="-s -w -extldflags=-static"     -o "$OUTPUT_DIR/$PREFIX_NAME"     .
+
+strip "$OUTPUT_DIR/$PREFIX_NAME" 2>/dev/null || true
+
+(
+  cd "$OUTPUT_DIR"
+  tar -czf "${PREFIX_NAME}.tar.gz" "$PREFIX_NAME"
+  sha256sum "$PREFIX_NAME" "${PREFIX_NAME}.tar.gz" > "${PREFIX_NAME}.sha256"
+)
+
+file "$OUTPUT_DIR/$PREFIX_NAME"
+ldd "$OUTPUT_DIR/$PREFIX_NAME" || true
+
+if file "$OUTPUT_DIR/$PREFIX_NAME" | grep -qi 'dynamically linked'; then
+  echo "error: output binary is still dynamically linked" >&2
+  exit 1
+fi
+
+echo "build OK: $OUTPUT_DIR/$PREFIX_NAME"
diff --git a/scripts/sync_busybox_version.py b/scripts/sync_busybox_version.py
new file mode 100755
index 0000000..e1c4fc5
--- /dev/null
+++ b/scripts/sync_busybox_version.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+import argparse
+import re
+import sys
+import urllib.request
+from pathlib import Path
+
+DOWNLOADS_URL = "https://busybox.net/downloads/"
+VERSION_RE = re.compile(r"busybox-([0-9]+(?:\.[0-9]+)+)\.tar\.bz2")
+
+
+def version_key(version: str):
+    return tuple(int(part) for part in version.split("."))
+
+
+def fetch_latest_version() -> str:
+    req = urllib.request.Request(
+        DOWNLOADS_URL,
+        headers={"User-Agent": "static-musl-builds-updater"},
+    )
+    with urllib.request.urlopen(req, timeout=30) as resp:
+        html = resp.read().decode("utf-8", "replace")
+    versions = sorted(set(VERSION_RE.findall(html)), key=version_key)
+    if not versions:
+        raise RuntimeError("No BusyBox versions found on downloads page")
+    return versions[-1]
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--version-file", required=True, type=Path)
+    parser.add_argument("--update-file", action="store_true")
+    args = parser.parse_args()
+
+    latest = fetch_latest_version()
+    current = args.version_file.read_text(encoding="utf-8").strip() if args.version_file.exists() else ""
+
+    print(f"current={current or '<missing>'}")
+    print(f"latest={latest}")
+
+    if current == latest:
+        print("status=up-to-date")
+        return 0
+
+    print("status=update-available")
+    if args.update_file:
+        args.version_file.parent.mkdir(parents=True, exist_ok=True)
+        args.version_file.write_text(latest + "\n", encoding="utf-8")
+        print(f"updated_file={args.version_file}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/scripts/sync_github_release.py b/scripts/sync_github_release.py
new file mode 100755
index 0000000..e04a798
--- /dev/null
+++ b/scripts/sync_github_release.py
@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+import argparse
+import json
+import re
+import sys
+import urllib.request
+from pathlib import Path
+
+VERSION_RE = re.compile(r"[0-9]+(?:\.[0-9]+)*")
+
+
+def fetch_latest_tag(repo: str) -> str:
+    url = f"https://api.github.com/repos/{repo}/releases/latest"
+    req = urllib.request.Request(
+        url,
+        headers={
+            "Accept": "application/vnd.github+json",
+            "User-Agent": "static-musl-builds-updater",
+        },
+    )
+    with urllib.request.urlopen(req, timeout=30) as resp:
+        data = json.load(resp)
+    return data["tag_name"].strip()
+
+
+def normalize_version(tag: str, strip_prefix: str) -> str:
+    version = tag
+    if strip_prefix and version.startswith(strip_prefix):
+        version = version[len(strip_prefix):]
+    version = version.strip()
+    if not VERSION_RE.fullmatch(version):
+        raise ValueError(f"Unexpected version format: {tag!r} -> {version!r}")
+    return version
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--repo", required=True, help="owner/repo on GitHub")
+    parser.add_argument("--version-file", required=True, type=Path)
+    parser.add_argument("--strip-prefix", default="v")
+    parser.add_argument("--update-file", action="store_true")
+    args = parser.parse_args()
+
+    latest_tag = fetch_latest_tag(args.repo)
+    latest = normalize_version(latest_tag, args.strip_prefix)
+    current = args.version_file.read_text(encoding="utf-8").strip() if args.version_file.exists() else ""
+
+    print(f"repo={args.repo}")
+    print(f"current={current or '<missing>'}")
+    print(f"latest={latest}")
+
+    if current == latest:
+        print("status=up-to-date")
+        return 0
+
+    print("status=update-available")
+    if args.update_file:
+        args.version_file.parent.mkdir(parents=True, exist_ok=True)
+        args.version_file.write_text(latest + "\n", encoding="utf-8")
+        print(f"updated_file={args.version_file}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/versions/busybox.version b/versions/busybox.version
new file mode 100644
index 0000000..bf50e91
--- /dev/null
+++ b/versions/busybox.version
@@ -0,0 +1 @@
+1.37.0
diff --git a/versions/doggo.version b/versions/doggo.version
new file mode 100644
index 0000000..e25d8d9
--- /dev/null
+++ b/versions/doggo.version
@@ -0,0 +1 @@
+1.1.5
diff --git a/versions/speedtest-go.version b/versions/speedtest-go.version
new file mode 100644
index 0000000..a412349
--- /dev/null
+++ b/versions/speedtest-go.version
@@ -0,0 +1 @@
+1.7.10