More Linux utilities: Pinta, Teamviewer, Spotify

Pinta is a basic graphics editor which is inspired by the Windows software It is simpler and easier to use than Gimp, and runs under Mono. 

Teamviewer has a Linux client available that I have used on Xubuntu.

Spotify also has a Linux client available that works well under Xubuntu. However, there are currently some bugs and issues with it, and development is not continuing at present due to a lack of resources and priorities, the key issue being lack of demand for the Linux edition.