There is also Czechpoint (Alfa Proj) for double action. in 22lr and 22wmr.
http://www.czechpoint-usa.com/alfa-proj-revolvers
(since you are trying to have a comprehensive list)
Also, there are 6 models of Charter Arms in rimfire .22. They are all called "Pathfinder", But there is a 2",4" and 5" .22lr and 2",4" and 5" in 22 mag.