The Keeper Library
- Background details, hints and tips about the campaign world.
- http://www.btinternet.com/~sneaksiethiefsie/

Garrett's Notebook
- Includes a walkthrough which reveals the placement of secrets and loot hidden in the Thief 1 and 2 missions.
- http://www.3dactionplanet.com/thief/walk

The Keep of Metal and Gold
- A collection of fan missions with screen shots.
- http://www.keepofmetalandgold.com/

Zaccheus - The Honest Thief
- Fan missions, links, tips and challenges. Includes dromed advice.
- http://www.rcl-software.org.uk/thief/

Thief Underground
- Features articles, media, fan missions, tutorials and dromed resources.
- http://www.3dap.com/thief/

The Circle of Stone and Shadow
- TTLG produced site which includes news, fiction, utilities and a large archive of fan-missions.
- http://www.thief-thecircle.com/

Lytha.com
- Large sections dedicated to the Thief series of games; including FAQ, newbie hints, surveys, detailed walkthroughs, loot lists and general information.
- http://www.lytha.com/