Pinta is a basic graphics editor which is inspired by the Windows software Paint.net. 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.