The brainstorming tools are used for generating ideas and gathering input from groups. MeetingSphere, Stormboard, Mural are some of this type of tools.
Applicable in any project.
There is no particular business case.
Based on a brainstorm question, participants enter and post their contributions. Further refinement is achived throught comments. Contributions are immediately visible to all. Contributions can be voted to prioritize the most popular.
Collecting lists of ideas, categorising them.
MeetingSphere: stand alone app.
Stormboard: stand alone app, web based.
Mural: stand alone app.