When going to use kanban, a team/organization needs to decide whether to use a physical or electronic board.
A physical board is tangible, fully customizable, and is a great Information Radiator out of the box.
The physical board is limited when it comes to supporting distributed teams, easy tracking of metrics such as Cycle Times, CFD, etc.
With Kanban, a lot of teams choose to go to an electronic Kanban tool, and some of them use a combination of a tool and a physical board. These days several trends are trying to converge the Physical and Electronic boards. One approach is to use Touch-based LCDs which are becoming cheaper and cheaper by the month. Another approach is to extract data from physical boards using QR codes or RFIDs.
There is a plethora of electronic Kanban tools in the market. Some are built around Kanban. Some are general Agile Lifecycle Management tools starting to provide Kanban story boards as well.
For your convenience - here is a partial list of tools you might want to start your search with (in alphabetical order). we can also help you select and implement a Kanban tool based on our experience.
AgileZen - www.agilezen.com
Digite - Swift-Kanban
LeanKitKanban - www.leankitkanban.com
RallyDev - Rally Kanban Board
VersionOne - Kanban-based story board
Whether physical or electronic, Henrik Kniberg's Kanban Board Kick-start example is quite useful as a good starting point