Unity Tweak Tool is a relatively new application that allows you to configure Unity, providing access to settings buried deep in Dconf-Tools or CCSM.
ownCloud is a free software alternative to proprietary web services such a Dropbox, Google Calendar and more. You can install it on your computer or web server and access (and share) your files from any OS, since ownCloud comes with desktop clients for Windows, Mac OSX and Linux as well as mobile clients for Android and iOS.
Quick update: now that Ubuntu GNOME is an official Ubuntu flavour, it can make use of the Ubuntu infrastructure, and the first daily builds are now available for download:
The default GNOME icon theme isn't very popular among GNOME users, mainly because of the default folder icons, which many label as ugly (here's an example). However, with GNOME 3.8, the folder icons will use a different color which attempts to fix this, but is it enough?
Pidgin OpenSteamWorks is a plugin that allows you to chat with your Steam friends from Pidgin.
Why use it? Well, if you're both a Steam and Pidgin user, you may find it more convenient to chat with your Steam friends from Pidgin, without having to open Steam, especially since the Steam Linux client is very resource hungry.
Intel has released a tool that allows Linux users to easily install the latest graphics drivers to ensure the best user experience with Intel graphics hardware.
In his rolling release proposal, Rick Spencer, Engineering Director at Canonical, has said that the new rolling model should be implemented now, with Ubuntu 13.04 Raring Ringtail, which meant Raring wouldn't be released.
According to a recent announcement, Ubuntu will use its own Display Server called Mir. The reason for this is that "none of the existing solutions would allow us to implement our vision without taking major compromises which would come at the cost of user experience and quality".
A while back, it was decided that Ubuntu 13.04 Raring Ringtail will ship with GNOME 3.6 for the most part instead of GNOME 3.8.
Raring Ringtail might become Rolling Release but if/until that happens, Raring users can add the GNOME 3 PPA, which was updated recently, to upgrade to the latest GNOME 3.8 beta for many components, including GNOME Shell and Nautilus.