Often people will get themselves banned from a server because they used the wrong SSH key or they simply forgot their passphrase or even password. This simple little piece of tech will help your Sys Admins/DevOps deal with these minor annoyances with greater ease.
Recently we've been working on integrating OpenKM into one of our Django projects. OpenKM is an open-source document management system written in Java. The end result was that I wrote and open-sourced a Django app called django-openkm. which anyone can use to delegate document management, storage, search and more from your Django app to OpenKM.
Over on codeinthehole.com, David Winterbottom has written up a Fabric function for elegantly handling git tagging when running deployments. Such a function is part of all python deployment scripts used at Tangent Labs - it helps ensure that every build is either tagged or has a build number that helps QA determine where in the release cycle an integration build is.
Kura wrote an article on his personal blog explaining how to get your own PGP keyserver up and running, including a browsable web interface for people to use to read and submit keys.