Synergy is Free and Open Source Software that lets you easily share your mouse and keyboard between multiple computers, where each computer has it's own display. No special hardware is required, all you need is a local area network. Synergy is supported on Windows, Mac OS X and Linux.
PirateBox is a self-contained mobile collaboration and P2P file sharing device
Trimage is a cross-platform GUI and command-line interface to optimize image files via optipng, advpng and jpegoptim, depending on the filetype (currently, PNG and JPG files are supported)
After you ./configure; make your program, CheckInstall will run make install and keep track of every file modified by this installation
Easy way to install Fluxus on ubuntu... + some other usefull softwares too