Wekan is an open-source kanban board which allows a card-based task and to-do management, similar to tools like WorkFlowy or Trello.

Wekan allows to create Boards, on which Cards can be moved around between a number of Columns. Boards can have many members, allowing for easy collaboration, just add everyone that should be able to work with you on the board to it, and you are good to go! You can assign colored Labels to cards to facilitate grouping and filtering, additionally you can add members to a card, for example to assign a task to someone.

JAM Circle is a Kanban Application Platform using Card(like Sticky note) and Lane(Pane) or Icon.

JAM Circle is supported to connect XMPP service(like GTalk) and send card data to other user. Sometimes you use mail to ask to do your Task to someone.You can use JAM Circle to these situations.

JAM Circle is defined Action using scripting language,JRuby or JavaScript(using Rhino). You can define action when you open board,and put card to lane(icon),remove card from lane(icon). For example ,if you want to plan some tasks in BTS(like Bugzilla,or Trac,or Redmine... these has API to public services.) you define script to get some tickets from BTS on board script, and you define script to change the priority ,due on lane script.