how to differentiate japanese name suffixes

What is the difference between -san, -chan, -kun, -sama, -chi, -ichi?
I know when Japanese people address someone, they add a suffix to the name. I want to know the meanings behind each of them. -ichi and -chi aren't as common but I still don't know what they mean TT^TT
And can -kun be used to address girls as well?

If you meet someone for the first time, you start with "-san." That is the polite version. That is like referring to someone with "Mr...." or "Ms...."
"-sama" is more respectful one, used to refer to someone apparently senior to you in ranking, or shop/hotel people referring to guests.

Others are considered more "familiar" ones, and are more part of nicknames. "-kun" and "-chan" might be used among college classmates when referring to their friends. But I would not use them unless someone tells you to "call me (-chan)" or something like that.

The same with "-chi," and this does not work with every name. It gets integrated into the nickname. You could consider "-(i)chi" as something similar to "diminutives" in some European languages - as in Spanish, to call a girl with the name "Raquel," they might say "Raquelita" instead, for "cuter" tone to the name :)

http://en.wikipedia.org/wiki/Japanese_honorifics

-ichi/-chi is what?
nick name's???

Yes, as the previous poster said, you can use those to make diminutive nicknames. They aren't honorifics though, so they're not gonna show up on that wiki page.

(Sorry I was too lazy to log in earlier.)

Yes, "-chi/-ichi" is just to make it sound cute, "diminutive." It is not a respectful expression at all.

All I know is in Spanish, some people (mostly family members) say "Raquelita" to a girl named Raquel, "Juanita" to a girl named Juana, etc. Like "little/cute Raquel," "little/cute Juana."