Electronic boards for agile teams

What electronics tools exist to electronically master the agile process like Scrum, Kanban, and others?
Since this question surfaces every now and then, answers collect here (in alphabetical order).

• Agile Bench
• Google Docs
• Microsoft » Excel
• FlowKaizen
• Atlassian » Greenhopper for JIRA
• Hansoft
• Bandit Software » LeanKit Kanban
• Pivot Labs » Pivotal Tracker
• Rally Software » Rally
• ScrumDesk
• Silver Stripe » Silver Catalyst
• smartQ
• TargetProcess
• Version One Suite
• Atlassian » Vodafone wins Ultimate Scrum Board Award

Got more?
Contributors:

• Serge Beaumont
• Erica
• Theo Gerrits
• Olav Maassen
• Pieter Rijken
• Yves Hanoulle
• Jem