The following are the various versions of bbPress, listed chronologically from the oldest to newest.
|Version||Release Date||Named After||Announcement|
|1.0||July 3, 2009||Bechet||Blog|
|1.1||September 21, 2011||Blog|
|2.0||September 21, 2011||Blog|
|2.0.1||November 13, 2011||Blog|
|2.0.2||November 28, 2011||Blog|
|2.1||July 8, 2012||Blog|
|2.2||November 19, 2012||Blog|
|2.3||April 14, 2013||Blog|
|2.4||September 2, 2013||Blog|
|2.5||November 25, 2013||Blog|
The latest changelog for the 2.x plugin version can be found here.