Parapin makes it easy to write code under Linux that controls individual pins on a PC parallel port. This kind of control is very useful for electronics projects that use the parallel port as a generic digital I/O interface (instead of as a printer port)
DVD/CD UDF disc drive tools, esp. for the Iomega RRD (aka Iomega REV) drive. Usability patches for UDF mkfs and fsck. Commentary for the lk MMC and UDF source code. cvs co tarballs for firewalls that defeat CVS. Links, FAQ's, troubleshooting hints.