I recently read an interesting blog post about the banking app Swish. Check it out here. Also, it seems that Swish uses GPL’ed libraries in their app, but they refuse to release the source code for it. My advice is: don’t use Swish.
Also, as part of my work, I’ve contributed for the first time to some real open source project, namely the Yocto project. Check out my patch for the SPDX bbclass. SPDX is a standard for describing software licenses for files (sort of). We use the Yocto project to build a custom embedded Linux-based platform.
Update 2014-11-20: Another patch by me was accepted for the same class, yay!
Update 2017-11-12: Since at least two years back, I’m using Swish because it is too much of a hassle not to.