MrTools is a suite of tools for managing large, distributed environments. It can be used to execute scripts on multiple remote hosts without prior installation, copy of a file or directory to multiple hosts as efficiently as possible in a relatively secure way, and collect a copy of a file or directory from multiple hosts.
dgrey is a greylisting policy server that allows greylist information to be synchronized between multiple mail servers. All information is shared between the nodes and the nodes are equal; there is no master. The nodes may lose communication for a while and still be able to correctly resynchronize later. This works because all nodes keep a log of changes to the database. All communication is done across TCP connections, which can optionally be password protected. dgrey works with mail transfer agents such as Postfix and Exim.
mimms is an MMS (e.g. mms://) stream downloader. mimms is a program designed to allow you to download streams using the MMS protocol and save them to your computer, as opposed to watching them live. Similar functionality is available in full media player suites such as Xine, MPlayer, and VLC, but mimms can be quicker and easier to use.