Xmind - Xmind is a brainstorming and mind mapping application.
StartupTalks - A curated collection of startup related videos and podcasts
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Talks by UI Patterns - A library of talks by UX experts
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
Spectacle V0 (previously Startup-Videos) - Showcasing the best startup videos