This page (titled 'C3DS Archives') showed up in early 2009 and has begun to "host" several breeds, agents, and metarooms for Creatures 3 and Docking Station that it refers to as "lost".
The site seems to contain files from Creatures sites which are not currently functional or files that are not available elsewhere - most notably, files from C2toDS. However, there are some additional agents available, mostly for removing things or altering specific metarooms.
You can find the main site here: http://sites.google.com/site/c3dsarchives/Home
It's advisable to try to download these agents at their original sites first.
Currently included: (as of Feb 15 2009)
- Trollop's Clover Agent
- Random's Room
- Emmental's Dummy Control Agent
- Ombra Bengals
- 'Neige Bengals'
- Geat_Masta's C2 to DS (Incomplete)