Wikipedia discusses Esperanto Fonts:
For Windows and Unicode
For Mac OS X
Ebbinghaus -- Free Flash Card Software for Mac OS X
Vikipedio en Esperanto -- Wikipedia articles written in Esperanto
USEJ’s Resource Links -- the USA Esperanto Youth Organization has organized a list of informative links you may enjoy browsing.
Esperanto Association of Britain -- various links gathered together by the EAB
English to Esperanto Translation Tool--fun tool to translate English words and sentences into Esperanto. It isn’t perfect, like most translation software, but pretty good! Give it a try. Once at the page, slide down the language selection menu to find Esperanto.