We have a huge database of user agents, organised by Software, Operating System, Platform, Hardware Type, Software Type and Rendering Engine:
https://developers.whatismybrowser.com/useragents/explore/
All the other user agent listings do a pretty average job of making it easy to browse related user agents, so when I built this listing, making this easy for users was one of the major priorities behind the design of it.
You can also sign up for the free API which will give you access to our User Agent Parser.
https://developers.whatismybrowser.com/api/