An OO encapsulation of the Flash drawing API:

• Macromedia – Developer Center : Advanced drawing methods in Macromedia Flash MX
  Advanced drawing methods in Macromedia Flash MX
  (tags: software flash drawingapi as1.0)

Bringing File system in user space (FUSE) and hence NTFS and sshfs  to MacOSX (Nice work of Amit Singh during his 20% Google free project time)

• macfuse – Google Code
  A FUSE-Compliant File System Implementation Mechanism for Mac OS X MacFUSE implements a mechanism that makes it possible to implement a fully functional file system in a user-space program on Mac OS X. It aims to be API-compliant with the FUSE (Filesystem
  (tags: software filesystem macosx opensource google fuse)