What are some alternatives?
AquaSnap - Too many windows on your screen? Stop wasting your productivity.
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
Shiftit - fikovnik has 62 repositories available. Follow their code on GitHub.
CodeKit - CodeKit allows you to optimize the performance of your website by automatically and efficiently compiling a variety of popular languages.
Spectacle - eczarny has 16 repositories available. Follow their code on GitHub.
TotalTerminal - TotalTerminal is a plugin for Terminal. app which provides Quake-style terminal window available on keyboard shortcut.