Xmind - Xmind is a brainstorming and mind mapping application.
Sketch Extensions - An official collection of Sketch extensions & plugins
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Remake - A way to make web apps with just HTML & CSS
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
Sketch Repo - Collection of resources for anyone who uses Sketch