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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.
Creativity 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.
Halfbakery
A communal database of original, fictitious inventions, edited by its users and spanning many topics.
Idea A Day
A new idea every day.
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.