Dear Diary
An online service that lets you maintain an internet diary for free. You diary does not stay private and is made available for others to read. Consider using a pseudoname.

Diary Land Best of the Net
Another great online diary community. This one allows you to make your diary private or public and caters to teens.

Live Journal
You have to download some software for this one, but it is totally free. Keep your diary online, public or private access available.

My Dear Diary
Claims to be the first internet diary community. This one does not censor it's writers, so beware. You do not have the option of making your work private but you MUST be listed anonymously.

Open Diary
Creat a public or private diary. Share your toughts with the world, or don't! It is up to you. This site boasts over 100,000 diaries in 72 countries. Better for older teens.

Teen Open Diary Best of the Net
From Open Diary, this site is just for teens and has better controls and a strict privacy policy in place. You can make your diary private or public and change it back and forth at your leisure. Better for younger teens.

The Diary Registry
A diary entry search engine. No posting your own diaries here, but you can search for other people's diaries. Search using many different criteria.

Where the Journals Are
Not a diary service, but a listing of diary entries divided by time zone.