If you know a link that is not listed but should, don't hesitate to mention it to me.
Custom Lemmings Levels < No updates since 23 January 2005.
Lee's Lemmings Paintball Page < No updates since 4 December 2006.
Lemmings Universe < No updates since 4 September 2006.
LemmingsWelt.de < No updates since 24 March 2005.
LemProject < No updates since 1 July 2007.
Oh No! It's the Lemmings Games Web Page < No updates since 2 September 1999.
The Lemmings Compendium < Stopped updating since 14 September 2002.
The LemNet Chronicles < No updates since 7 August 2000.
Last edit: Friday, 22 June 2018.
Main source: own words.