Stackyard is a free, open-source desktop app for Windows and Mac that shows every SDK, toolchain and framework version on your computer, which of your projects use each one, and what's safe to remove.
Version managers like FVM, nvm, pyenv and SDKMAN are good at installing versions. None of them tells you that you have six Flutter SDKs, three Android NDKs and a 13 GB emulator you haven't started in a year. Stackyard scans your machine and your project folders, reads the files projects pin versions in (.fvmrc, .nvmrc, package.json, Gradle files, .python-version, global.json), and marks the versions nothing uses.
Problems come with a fix button: a project that pins a Flutter version you don't have, a JAVA_HOME pointing at a deleted folder, dead PATH entries, or a Java too new for a Flutter app's Gradle. Each is explained in plain words, and you see every step before it runs.
It also clears build, node_modules, .dart_tool and Pods folders in projects you haven't touched in months, manages Android emulators and iOS simulators, and installs any version of Flutter, Node, Java, Python, Go, Rust and more straight from the publisher, checked against their hash.
Removals go to the Recycle Bin or Trash, and Stackyard never edits your projects. Everything runs locally, with no account and no telemetry. MIT licensed.
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