Pocket - When you find something you want to view later, put it in Pocket.
Mind Map by RealtimeBoard - More than your average mind map
Keep Everything - Light & Fast Web Archiver for iOS, OS X.
Text 2 Mind Map - Make a dynamic mind map from a plaintext nested list
Taggy - App for fast saving anything without losing focus
Whimsical Mind Maps - Fast & beautiful mind maps with real-time collaboration