Shotwell is a relatively new open source photo organizer designed for the GNOME desktop environment. It's purpose is to allow you to easily organize your digital camera photos (basic editing included).
Seahorse is a Gnome front end for GnuPG - the Gnu Privacy Guard program. It is a tool for secure communications and data storage. Data encryption and digital signature creation can easily be performed through a GUI and Key Management operations can easily be carried out through an intuitive interface.
Caffeine is a Gnome applet which basically prevents your computer's screensaver and power saving to activate. The applet works simple but effective: a coffee-cup will be displayed and when you click it, the coffee-cup fills up and keeps your computer from going to sleep.
Mac OSX has Spotlight, MS Windows has Desktop Search or even Google Desktop and Linux/Gnome has Beagle. Like so many things in Unix, Beagle is faster, more powerful via the command line, and hostilely requires user configuration.
Tired of searching Google for movie subtitles and just wanted to find them in the folder where you keep your movies? Now you can, by using Periscope, which is a Python script that integrates into Nautilus and all you have to do is right click a video file and select "Find subtitles for this video", then the exact subtitle will be downloaded in the folder where the video was.
Gnome-look.org has a LOT of wallpapers but to download all of them them, you need to do a lot of clicking. Here is how to download them all with a single command
Rainlendar2 is a calendar application with lots of features which works on Windows, Linux and Mac OSX.
What I like about it, other than being cross-platform, is that you can import an holidays ICAL to it, the way it integrates into the Gnome desktop (screenshot above) and the Google Calendar like reminders. Rainlendar2 comes also with skins and lots of options.
Windows XP sets an image called folder.jpg as the icon of that folder. We can achieve this in Gnome / Nautilus too, with the use of a Python script, thanks to fifo @ubuntuforums (via Stephen O'Sullivan).
The script basically automates the process of converting a folder icon to, by default, an image in that folder by the name of either folder.jpg or Folder.jpg.
Not so long ago we discovered a simplified version of Nautilus which seems to miss Ubuntu Karmic after all so the only way to get it is through it's PPA.
This quick tip is for Gnome users. I always wanted new windows to start centered on the desktop but never searched for something to modify this behavior. But yesterday I stumbled onto something which fixes this by changing 2 parameters in Gnome's almighty gconf editor:
There is now a script called Gnome Gmail that comes as .deb for Ubuntu and .rpm for Fedora and Red Hat which adds support for Gmail to the Linux Gnome Desktop. Unlike the solution above, Gnome Gmail supports "To:", "Subject:", "body", "CC:", and "BCC: fields.
Moon Buggy Alpha runs on Jaunty using the murrine engine 0.90.3. Optionally for increased contrast and definition use the included "gnome color chooser" theme file .gnomecc.
GTK 2.x theme
Although designed with the GNOME desktop environment in mind, Font Manager (for Linux) should work well with most major desktop environments such as XFCE, Enlightenment, and even KDE, as long as PyGTK is available.