Tactical Ops TV - YouTube channel started in 2015 to keep TO:AoT alive with multiple uploaders.
333 Networks - Server list and master server, displays all servers that uplink to the master server.
UT Files - File Archive with Unreal Tournament files.
Unreal Archive - File Archive with Unreal and Unreal Tournament files.
Unreal Admin - Site with information related to Unreal, UT99 and Tactical Ops server configuration and settings.
Old Unreal - Site dedicated to the old Unreal and Return to Napali expansion.
UT99.org - The biggest and most active Unreal Tournament 99 community.
TO22.org - Community site dedicated to the TO2.2 mod for UT99.
YGH - Your Gaming Hosts Admin Hub.
TO4 - TO4 Tactical Operations built on Unreal Engine 4 that is "Early Access" on Steam.
Old TO Sites
ESE Protect - Official site from the ESE Anti Cheat for TO3.5. Downloads, documentations, forum for support etc.
Die Spielwiese - Site from the old Spielwiese server.
Tactical Square - Archive of the Tactical Square site.
TOSP - The old site from the Tactical Ops Singleplayer Mod.
AIM-IT - Old AIM-IT mapping team Site.
Zlodey's Site - Old page from Zlodey with some downloads.
Old Sites On web.archive.org
You can modify the date of the Site that is loaded, the current one is mostly random. Try selecting different dates if the page is incomplete.