Space Empire IV (not gold)..

[henk brouwer]

follow this link for TDM, it has the best AI out there:

http://home.t-Online.de/home/320045362204-0001/

[Suicide Junkie]

Pirates and Nomads mod Versions 1.x and 2.x are for SE4 classic (3.x are for gold).

P&N can make for quite a challenging game as a Pirate race, especially against TDM AIs.

[capnq]

There's a SE IV Classic Mods (pre-Gold) {link} thread in Shrapnel's Mod Archives, which more people ought to list their older mods in.

[oleg]

There must be the pre-Gold Babylon5 mod somewhere !