This seems like a great place to plug f-droid which is basically an Android "market" of all open-source apps that they compile themselves. Download reddit is fun from f-droid here:
F-Droid has a major flaw, in that Android (as of now) doesn't allow auto-updating of apps outside of Google Play. I only install a limited number of apps from there for that reason.
Almost every android app I use is from the f-droid store, due to being on a unrootable phone so no ROMing for me. I love it, but it isn't perfect so it's nice to see work still being done on it.
Even if I go on to install the app from the Play store, I use f-droid to filter down to non-user hostile apps in oversubscribed categories like soduko apps.
reply