The reference section at the Internet Public Library' KidSpace. "Here's the place to go for all your general reference needs! There are links to dictionaries, encyclopedias, almanacs, and other sites for homework help or just looking things up."
"The single best source for facts on the Net." If you need a reference source, it's probably here.
You can find links to sites on everything from Acronyms and Area Codes to World Maps and Zip Codes.
The on-line version of Encyclopedia Britannica. Read encyclopedia articles on subjects you are researching, and find links to related sites and articles on your topic.
An online dictionary you can use to look up definitions of words. You can also access a thesaurus (Thesaurus.com), word puzzles, or the "word of the day."
A dictionary site where you can use the Student Dictionary to look up words, create secret codes, and have other fun with words. "Includes homework help and lesson plans for parents, teachers."
If your clocks never agree, you might want to find out the official time. You can check the time in different time zones, or find out interesting facts about time and timekeeping.
Today's date and time, and what day and year it is according to many different calendars. There are also links to many types of calendars for different cultures and religions, plus sites that tell what happened on this day in history, and many, many more.
The bare minimum information but still helpful.
"The dictionary can be searched by birth years, death years, positions held, professions, literary and artistic works, achievements, and other keywords."