AppManager. Super stable, feature-packed app that can do nearly everything with your apps.

AdAway. No ads in apps. At all.

Simple utilities. Just very good replacement for Google proprietary suite of apps. Good design, feature-rich, simple to use. Developer is really awesome!

Message editing is work in progress currently. Discussion link. Really cool feature!

For me Thuder has better UI but lacks functionality, f.e. answering to replies is nightmare because no context of comment.