Zclean is a tool designed to remove zombie processes from systems where rebooting is not an option or where zombies spawn so quickly that rebooting becomes an issue itself. Zombie processes are unkillable (they've already finished execution) and therefore their removal requires manipulation of the kernel task list.
Zebot is an IRC bot with a completely modular design, POE event driven architecture, multi channel and server support, dynamic internationalization support, and user- definable reactions and emotes along with basic IRC bot functionality including channel camping, rights distribution, user authentication, and a message system.
The zeroer utility can be used to wipe empty space on a disk. In contrary to dd, zeroer does not wipe existing files on a partition. It overwrites the unallocated disk spa ce around existing files, which means that deleted files cannot be restored after processing a certain partition with zeroer. The utility's principle consists in writing huge zero-padded memory blocks to a file. To a certain extent, this works similar to dd, but zeroer dynamically reduces the blockwriter's buffer size when the filesystem is going to be full.
zfec is a fast, portable, and programmable implementation of erasure coding. It includes a C library, a Python library, and a command-line tool. Erasure coding is also known as "forward error correction", which is the generation of redundant blocks of information such that if some blocks are lost then the original data can be recovered from the remaining blocks. The RAID-5 algorithm is an erasure code, but while RAID-5 can recover from the loss of any one element, zfec can be parameterized to choose in advance the number of elements whose loss it can tolerate.