Mount Wilson Virtual Observatory
Features daily image taken at Mt. Wilson Observatory.
http://www.astrophys-assist.com/wilobs/

Archive-It.org
A subscription service from the Internet Archive, which allows institutions to build, manage and search their own web archive. Includes the sites of universities, libraries, and special interest collections of websites.
http://www.archive-it.org/

UNC -- The Odum Institute's Data Archive Data Archive Data Archive
Maintains one of the oldest and largest archives of machine-readable data in the U.S.
http://www.irss.unc.edu/data_archive/

Internet Parallel Computing Archive : PVM3
Archive of PVM-related tools and documentation.
http://wotug.kent.ac.uk/parallel/environments/pvm3/

WPWIN-L Archive
Archive for the WordPerfect For Windows Discussion List from 1992 to the present.
http://listserv.acsu.buffalo.edu/archives/wpwin-l.html

HPSG-L Archive
Web-based archive of this listserv, with files dating back to 1999.
http://listserv.linguistlist.org/archives/hpsg-l.html

Cogprints
An electronic archive for self-archive papers in any area pertinent to the study of cognition.
http://cogprints.org/

The Safdie Hypermedia Archive
A portfolio archive of the architect's work and philosophy.
http://cac.mcgill.ca/safdie/

Cool Archive
huge free vault of 1000+ clipart images, 950+ fonts, 4000+ icons, hundreds of animations, buttons, bullets, arrows, bars, html and photoshop tips, sounds. plus an online logo generator and button maker to create your own graphics!
http://www.coolarchive.com/fonts.php

The Automated Archive
Used for handling, maintaining, and searching an online archive. [Freeware]
http://www.netspace.org/~shalott/archive/