SmartEar allows you to assign different sounds to each of your buddies and/or groups in gAIM. The sound can be set to play on four different events independently: receiving an IM, buddy signon, buddy returns from idle, and buddy returns from away. A timer is also built in so that a given sound only plays once within a certain time period.
INL Splitter allows developers to keep a class implementation and interface in a single .inl file, basically inlining all class member functions. This simple script will split the .inl file, placing the function bodies in a .cc file, and the class definition and prototypes in the .h file.
Real Man's Compiler Collection is a collection of compilers for people that feel like they have become too reliant helpful error messages that point you directly at the problems in your code. It simply outputs a succinct "Yes" or "No" indicating whether your program compiled successfully, without bothering you with all the nitpicky details of what's wrong with your code.