Free Art Programs

Okay, so the graphic counter post has me again wanting to get into graphics, but I'm very limited with my ability to do so. I have my work computer that I can get online with, and then my computer at home that I usually can NOT get online with. I can't remember the art programs I used to use way back when, but I know they were online freeware that they did not require downloading anything. Can I get some recs of what programs to use, please and thank you, both online and off???