Can somebody suggest a good free tool for analyzing .Net memory dumps other than Adplus/windbg/sos ?
You could give a look at sosnet which is small opensource winforms application which wraps windbg/sos.
https://bitbucket.org/grozeille/sosnet
It's handy and straight forward to use.
Please try it out, and contribute to it by submitting ideas / patches
I found MemoScope.Net - an excellent GUI for WinDbg and ClrMd.
You can try out DebugDiag 1.1
Take a look at SOS Assist, it provides a GUI around SOS.
You can load sos and your memory dump into Visual Studio to at least insulate you from the 'interesting' ui that WinDbg presents.
I fully recommend .Net Memory Profiler. Beside being a great live memory profiler for .Net applications, it can also load memory dumps, and let you traverse the objects in the dump in a very intuitive an easy way.
Opening big dump (> 1 GB) can take a few hours though, but for us it's worth the wait. I don't know if they have trial version, but if they do you should definitely give them a shot.