We can use any communication method to collaborate. Normally, it depends on which one is the most preferable communication method for the team. For example, those who work with ubuntu related development will prefer Launchpad for bug tracking and so on. Testing is done by users or anyone who is interested to do it by downloading the packages/codes, install and use it. Whenever they see any problem, they will report it to the bug tracking system. You may also look at http://trac.edgewall.org/ or view http://bugs.launchpad.net for example of collaborative bug tracking. Other popular communication method in open source development is Mailing List, IRC and wiki. Mostly, IRC and Mailing List methods are used for quick discussion on any matters related to the development while wiki is used to place documentation or guide for others.

me.. izam_vespa from komuniti juruteknik komputer Malaysia