The cryptoswap package supports creating an encrypted swap partition when a system boots. This may be necessary on systems that use encrypted filesystems because plaintext secrets may be written to disk when memory is swapped to disk. The project also includes the ability to build a Linux initrd that supports booting with an encrypted root filesystem.
daemon turns other processes into daemons. There are many tedious tasks that need to be performed to correctly set up a daemon process; daemon performs these tasks for other processes. This is useful for writing daemons in languages other than C, C++, or Perl (e.g. sh, Java). If you want to write daemons in languages that can link against C functions (e.g. C, C++), see libslack, which contains the core functionality of daemon.
divine will use ARP requests to look for hosts that are always up in the networks that you frequently use your laptop in and then set the IP configuration including /etc/resolv.conf and write proxy settings in /etc/proxy. A perl script to edit your netscape 4 preferences is included. You can also run a custom script for each network to edit /etc/printcap or /etc/issue or whatever you feel like. The ARP method is much quicker than the "ping" method that other solutions use.
eCos (Embedded Configurable OS) is an open source, configurable, portable, and royalty-free embedded Real Time Operating System. It is written in C++, provides all the usual OS things. You configure the OS so that the parts you don't need aren't loaded to the embedded system. eCos is released under a modified GPL that allows for its use in embedded systems without having to GPL the embedded application.
eINIT is an alternative init system. It's quite fast, since it can potentially be used without the help of any scripting at all, but it is still flexible and extremely modular. The focus is on speed and parallelisation, mostly with embedded devices and low-downtime servers in mind, and benchmarks do suggest that it's doing a fairly good job at that. It compiles cleanly (and should thus work, provided someone writes appropriate modules) on Linux, FreeBSD, and Darwin/Mac OS X.