my7thgen
Another useful Maxima site community! In case you are interested. but of course the .org imo is still the most useful. but never hurts to have more options!

NOTE: Has 4thgen 5thgen 6thgen 7thgen sites.
You only need ONE ACCOUNT to be able to sign into any of these sites they are all integrated see this thread:
http://my4thgen.org/showthread.php?t=32

if you sign up there let me know!