BrainFlower - A forum for creative, innovative and funny ideas. Entries are not published automatically, about half are accepted.
Brightidea - A global creative community dedicated to making the world better one idea at a time. Ideas are sorted into categories and can be voted on.
Meta Description: [ BRIGHTIDEA.COM - The leader in On-Demand Innovation Process Management. IPM starts at $49/month. Solutions targeted for middle-market companies to accelerate and manage Innovation. ]
404Creativity Pool - A global pool of innovation and new ideas. People can browse the database and search for creative inspiration, or donate their unused creativity and be rewarded.
Global Ideas Bank - An International Suggestion Box for socially innovative non-technological ideas and projects, with £1,000 UK sterling awards annually for the best ideas or projects submitted.
Meta Description: [ The Global Ideas Bank contains over 4,000 edited best social inventions (socially innovative ideas and projects) from around the world, voted on by the readers, with awards given, an international suggestions box covering from birth to death. ]
Halfbakery - A communal database of original, fictitious inventions, edited by its users and spanning many topics.
Idea A Day - A new idea every day.
Meta Description: [ Idea A Day publishes an orginal idea every day, the best of which appear in the The Big Idea Book edited by David Owen. The site is built by Fortune Cookie. ]
ShouldExist - Collaborative innovation, brainstorms, prototype reviews, a community of original thinkers scheming about how to make the world a better place.
Thinkcycle - Idea open source forum seeks to create a culture of open source design innovation.