http://www.zork.nu/	archive with some nice scenestuff from 1996 and older and proboard/RA/GS-Mailbox mods
http://bbsintros.vantage.ch	awesome collection of bbs ads
http://come.to/BBS_Links	BBS Scene Links Collective
http://archives.thebbs.org	BBS Archives - Great collection of BBS-related news
http://www.pouet.net	Very nice website about the demoscene, its releases, parties, groups and members.
http://www.demonic.net	demonic productions - Underground modding group, still active, lots of useful links and nice releases
http://www.scoopex.org	Austrian Demogroup from 1988
http://www.tecs.de	Tornado BBS (since 1984)