Some nice people decided to port morrowind weapons into garrysmod. There are some other packs they dont have videos for, they are going to do two more packs and that will finish all morrowind weapons. Then they will move onto oblivion weapons.
Here are some videos
http://www.youtube.com/watch?v=6xpvE-rE6qE
http://www.youtube.com/watch?v=rboM9wa1yME
http://www.youtube.com/watch?v=Z0Fc5nffb_8
http://www.youtube.com/user/billyishigh#p/u/1/vDHbN52_llY
http://www.youtube.com/user/billyishigh#p/u/2/PgX1r-2YXYc
http://www.youtube.com/user/billyishigh#p/u/3/aMS-is4wZJk
http://www.youtube.com/user/billyishigh#p/u/4/cEVXQ-tcQF0
http://www.youtube.com/user/billyishigh#p/u/5/Ed57i9y1x2w
http://www.youtube.com/user/billyishigh#p/u/6/KkSDzyQydP4
If you are not familiar with gmod, its reather hard to explain what it is. Just look at these gmod-made pictures. You can do anything and its not like pre scripted or anythin.
Heres some videos of various things you can do.
http://www.youtube.com/watch?v=hhs-uizW2Ss
http://www.youtube.com/watch?v=VP5URmRjUtU
http://www.youtube.com/watch?v=5gfVL5P93Us

I always rather liked the Stolen Pixels comic strip (example)... One of my favourite things to do in Garry's Mod is to turn off the AI, setup some terrain and two opposing forces (e.g. combine vs rebels) then switch the AI back on and watch them fight it out... Muwahahahah!
That comic strip was funny. I like making my own zombie survival maps.