Ideas banks

An ideas bank is a website where people post, exchange, discuss, and polish new ideas. Some of these are for the purpose of developing new inventions or technologies. Many corporations are also installing internal ideas banks to gather the input from their employees. Some of those systems also use a voting system to estimate ideas value. In some cases, ideas banks can be more humor-oriented than their more serious counterparts. The underlying theory of an ideas bank is that if a large group of people collaborate on a project or the development of an idea that eventually said project or idea will reach perfection in the eyes of those who worked on it.

Wikis
Although not nessecarily ideas banks per se, by allowing anyone to edit, wikis allow a group of people to work on information collaboratively. This collaborative writing can continue until all are satisfied with the article or piece of writing, but more often than not contributions continue as visitors add information, improve what is already there, and remove irrelevant or incorrect information.

Halfbakery
Main article: Halfbakery

Halfbakery is an example of a slightly less serious ideas bank. Users submit ideas, often jokingly, which are then commented on, often jokingly, by other users.

Global Ideas Bank
Main article: Global ideas bank

The Global Ideas Bank is very much the opposite of Halfbakery in that ideas are proposed seriously, and in some cases actually implemented. It started as a group of inventors in 1985 and became a large organizaton over several years until it was put online with it's current name in 1995.