Last month, popular jailbreaker MuscleNerd had announced on Twitter that RedSn0w could be made open source soon. This was followed by another announcement by the Chronic Dev Team that Greenpois0n too was being made available as an open source script. The team in fact went ahead to release the open source script for download earlier this month.
Following these developments, we now have Sn0wbreeze 2.1 for iOS 4.1 jailbreak too available for download. You may be aware that Sn0wbreeze is the Windows equivalent of PwnageTool that lets you jailbreak your iDevice. With this download, enthusiasts can now download, modify and rebuild new jailbreaking applications using the available source code. Of course, you will have to subscribe to the terms and conditions set forth by the General Public License.
The source code for Sn0wbreeze 2.1 can be downloaded from Github by clicking here.