Tacticalendar is an innovative calendar design implemented in SVG. It always lets you see 4 weeks ahead, even at the end of the month, unlike ordinary month-view calendars. When a week has passed, the oldest week slides out of the top. All the other weeks slide up. The oldest week is erased, reconfigured, and slides back in below to create a future week. The project provides source files authored through Inkscape using free fonts, with PNG previews for those without a suitable SVG renderer.
Multicrush is a wrapper around pngcrush that distributes the work of brute-force compressing a single image over several pngcrush processes. This gets you a slightly less than a linear speedup, caused by different compression methods having slightly different durations. For example, the author has measured a speedup of 1.92 on a 2-core Intel T5300, and 3.86 on a 4-core Intel Q6600. The only requirements are a copy of pngcrush and at least Python 2.4. If you have version 2.6 or higher, multicrush can automatically detect how many CPUs to use.