Shamelessly lifted from another forum:
The Perseus Project
It has entered most classical texts online both in the original
Greek/Latin, as well as with translations and commentaries. In addition,
the site has various very useful features, including a built in
dictionary (click on any Latin word to see the Lewis & Short entry),
various classical encyclopedias, and powerful intertextual search
It's a downloadable Latin-English dictionary. It has a text-based
interface into which you can type any Latin word, declined or conjugated
however, and it will tell you all the possibilities - it makes
translating texts much easier, as it's quicker than leafing through the
dictionary for every unknown word, and it also speeds up parsing (be
warned, it may stunt your learning of grammar if you are not careful).
Stanford Encyclopedia of Philosophyhttp://plato.stanford.edu/
European Cultural Heritage Online (ECHO)http://echo.mpiwg-berlin.mpg.de/home
Links to a lot of general info about philosophy, as well as web pages and complete e-texts arranged by philosopher or topic.
Philosopher's Digest (inactive)http://web.archive.org/web/20110723152959/http://www.philosophersdigest.com/
"The Philosopher’s Digest was founded with the intention of giving philosophers an easy way to stay abreast of the current literature while also providing a forum for cutting-edge commentary and discussion."
The Internet Encyclopedia of Philosophy
Many, many, many entries. Perry-Castañeda Library Map Collectionhttp://www.lib.utexas.edu/maps/
"This is a good site for maps, mostly current but the Historical Maps
section is pretty well populated as well. If you want a map involving
Texas they've probably got it."
There are further smaller source books drawn from subsets of these larger
ones for African, East Asian, Indian, Islamic, Jewish, Global and
Women's history, and the history of science. Some of the translations
are relatively old and many have been supplanted by newer versions, but
none of them are so old-fashioned that they're unusable.
Arabic Keyboard Layout
If there is a topic you can't find please just post it and I'll see if somebody else has a link to a resource.