Recently, I've played a number of custom modules that I felt were so good it would almost be a crime not to share them. At the same time, I'd like to encourage everyone else to share their (your) favorite mods.
Some of my personal favorites:
1) Hex Coda (
http://www.pixelscapes.com/hexcoda/)
This is easily the best module I've played to date in terms of originality and henchmen interaction. To quote the author:
Powerful multinational corporations aligned with corrupt politicians to gain power and control. A team of rebels, security system hackers, and hexcode compilers operating outside the law. Mutated beasts created by waste spills. Hulking mechanical security automatons with built in energy beam blasters. Dance clubs throbbing with synthesized music. Elven wizards who cast magic missile spells and summon dire tigers. ... wait, what? Huh?
2) Shadowlords/Dreamcatcher series (
http://adamandjamie.com/nwn/)
These mods have dominated the Hall of Fame for quite some time now, and while they are a bit dated, they're still top of the line in terms of roleplaying and custom content. (fly on the back of a dragon, walk the ocean floor..)
3) A Hunt through the Dark (
http://www.schlegels.de/ahtd/ahtdxp.htm)
A rather nice roleplaying mod that lets you play as a Dark Elf. The scripting and setting are great, but I didn't like the fact that the Drow talk like a bunch of 16-year old skaters. ("you killed the Gnomes? Cool!")
4)Elegia Eternum/Excrucio Eternum (no link - you'll have to check The Vault)
Elegia was one of the most professional mods I'd ever seen when I first tried it.It even included high quality voice acting. The whole module is one big puzzel, so its not much good to the hack n' slashers. Excrucio is the sequel, based on the same concept.