Alrik: there is a suggestions subforum at the Underdogs site, but her todo-list is very long. I'm not sure its the best place to host a game. If you want to spread it after hosting it elsewhere you could "advertise" (in a mature and civilized way so you wont be censored for spam) it in their reasonably active forum though.

No list of RPG mod resources is complete without the Infinity Engine modlist: http://modlist.pocketplane.net .

Can't believe you forgot the AGS website: :D

http://www.adventuregamestudio.co.uk/

Lots of great free amateur adventure games there (and of course a great tool for creating them yourself ;)). Oh, and of course there is:

http://www.scummvm.org/

For playing all your old LucasArt games and others on modern systems! Has links to a few old games that have been made free by the developers, too! (Beneath A Steel Sky, Flight of the Amazon Queens)

Okay, thanks, Zaleukos.

Edit : Just wanted to add that SCUMMVM is available for Linux, too !

Getting old games working:

http://vogons.zetafleet.com/

Dunno whether this falls in this gategory, but a ww2 tactical shooter called hidden and dangerous is freeware. I heartly recommand it to any ww2 fan.

Edit: updating the link: http://www.hidden-and-dangerous.net/deluxe/download.php

Given what I'm currently re-reading, that whole site makes me want a tzjin-anthony-ks

For non-Hitch-Hikers :-)

Yay! My 1st addition to this thread will be for the Yendorian Tales series of games.
Chapter 1 might be rough to get going in XP. Chapters 2 and 3 should work fine though.

http://www.swgames.com

Yendorian Tales Chapter 2 and 3 can best be described as Might and Magic 3-5 clones. The game looks and feels a lot like those games.

Cool looking stuff - I'll keep an eye on those …

Ah. Another example of "how to exclude the world outside which doesn't use credit cards at all".

Star Control 2 (aka The Ur-Quan Masters) is freeware now. It's a lot like an old classic RPG called Planet's Edge, but with RPG elements sacrificed (and admittedly there weren't that many in PE) in favour of a great story.

abandonia is a great site, tons of screenshots and reviews.

One of the best free modules for Neverwinter Nights 1:

Darkness over Daggerford

http://nwn.bioware.com/players/profile_daggerford.html

developed by Ossian Studios.

I can recommend this game for Baldur's Gate fans. Combat is fair / sometimes easy.
Great Story with many twists and sidequests. Watch out for Eastereggs :-)

Ultima V - Lazarus

It's basically a remake of the old Ultima V built in the Dungeon Siege (1) engine. You must have Dungeon Siege installed to play the game.

http://www.u5lazarus.com/

Double-dog down recommend this one, as noted in my article at GamerDad last year.

I couldn't believe that with Corwin in this thread it hadn't been mentioned … !

Another game that I just thought about was Minions of Mirth. MoM is a single and somewhat MMORPG along the lines of Guild Wars. It was made by just two people primarily and then the community stepped in and start adding resources (quests, artwork, crafting, alchemy, etc). The game is like $30 to register but there is no monthly fee for playing. I haven't played this in about a year but it had quite a bit of content back then and was being updated constantly.

http://www.prairiegames.com

I can recommend both Laz and MoM as great, fun games. For Laz check out my review at the Dot, and I wrote an interview with the devs of MoM back there as well. I'm too lazy to look up the links!! :)

I'm just waiting for the German-language release of Lazarus, and the French-language version has already been released !

http://www.shadowflare.us/
Pretty good action rpg. It was sold in 4 chapters, and I believe the first is free. A few features were cool. Worth checking out.