The article about hidden gems in Ubuntu's Universe repository is indeed also relevant for non-Ubuntu users, as you can apt-get them all.
It is found at The Fridge and covers from desktop eye candy to browsing the solar system:
Have you ventured beyond Ubuntus default GNOME desktop applications? Theres a wealth of great tools available in the Ubuntu repositories. The Universe is a huge place, and its easy to get overwhelmed by the amount of software available. But dont worry, because Jorge whiprush Castro will pilot our guided tour of universe applications that will make you fall in love with Ubuntu all over again. Whether youre an experienced user or brand new to Linux, theres always new hidden gems in Ubuntu waiting to be discovered.