Valve has just announced that Steam for Linux (beta) is now available to all Steam users:
Mounting an Android 4.0+ device in Ubuntu is pretty tricky, but there is a FUSE filesystem called Go-mtpfs, created by a Google employee because "mtpfs was very unstable" for him, which works great. Read on to find out how to use it and easily install it in Ubuntu using a PPA!
Martin Kozub, who has created the first Ubuntu-like skin for the Steam Linux client, has released a simple Skin Manager for Steam (obviously, for the Linux client) which you can use to install or remove skins.
Raspberry Pi, the "$25 computer", now has its own app store. Pi Store is available for Raspbian (Debian for Raspberry Pi) and only 23 applications/games are included right now, but the Raspberry Pi folks hope it will get a lot more, as users upload their own content to the store.
0 A.D, one of the best free, open source real-time strategy (RTS) games, has reached the alpha 12.
After forking GNOME Shell (Cinnamon), Mutter (Muffin) and GDM 2.0 (MDM), the Linux Mint team has forked Nautilus and the result is Nemo, a file manager which is now used by default in Linux Mint Cinnamon Edition.
SuperTuxKart (STK), a free, Mario Kart-like arcade racing game available for Linux, Windows and Mac OSX, has been updated to version 0.8.
Indicator Remindor, an application that can be used to schedule alarms or reminders has been updated to version 12.12, getting some new features and GNOME Shell support.
Nautilus 3.6 comes with a "Recent" sidebar item (left sidebar: Places > Recent) which displays recently used files: documents, pictures, music, videos and so on.
This is a pretty big privacy issue because there's no option in System Settings (GNOME Control Center) to clear the Nautilus recent files list or to disable it.
Audacious is a fast, lightweight music player that focuses on high audio quality. The application comes with a huge list of plugins and with two interfaces: a GTK interface (used by default) and a Winamp 2.x like interface (to which you can switch from the menu: View > Interface > Winamp Classic Interface).
SparkleShare is an open source file synchronization and collaboration tool somewhat similar to Dropbox, available for Linux, Mac OSX and Windows.
SparkleShare uses GIT version control system and can be used with code hosting services like GitHub, Bitbucket or Gitorious as well as your own server.
Drawers, an application that can be used to create stacks (drawers) on the Unity Launcher, has been updated to version 12.12.1, getting new features which some of you have requested such as an option to automatically close drawer when focus is lost and more.