Babylon--Download and install this free program and you can right click on any word on any English web page and get its equivalent in Hebrew.
Morfix Hebrew Dictonary--Excellent online dictionary that lets you type in any word.
Hebrew Dictionaries --Specialized dictionaries for all kinds of Hebrew terms.
Hebrew Acronyms--Compiled by Princeton University Library cataloger Rachel Simon.
Hebrew Keyboard Tutor--Use this free Java applet to learn how to type in Hebrew.
Hebrew Spell Checker -- Free program that works with Open Office and Firefox