Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
FaceCat - Chat anonymously with your friends
Plume - App for writing documents, scripts, books and more.
Power Toggles - An advanced power control widget for both your homescreen and notification panel. Free without ads.
Flamingo for Twitter - Flamingo for Twitter is a bright and colorful Twitter client that comes with a simple interface.
Helium Hotspot - Powering the world's first peer-to-peer wireless network