Alternatives to Overlay2 for all platforms with Open Source License

  • Afloat

    Keep windows afloat (heh) on top of all others. Pin windows to the desktop. Move windows from anywhere, not just the title bar. Turn a window into an...

    Free Open Source Mac SIMBL

    Afloat icon
  • CThruView Transparent Image Viewer

    CThruView is a free transparent image viewer that allows mouse clicks to go through the image. This makes your image see through and click through, so use it as tracing...

    • Discontinued The project is no longer developed. Last version, 1.0, released in September 2010, can be still downloaded from the official website.

    Free Open Source Mac Windows Linux Web

    CThruView Transparent Image Viewer icon
Know any alternatives we haven't listed?
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Platforms

Desktop

Show 4 less popular platforms