http://www.makebeliefscomix.com/ (very school friendly) http://www.bitstrips.com/ http://www.kerpoof.com/ (very school friendly) http://www.pikikids.com/ http://www.readwritethink.org/materials/comic/ (very school friendly) http://storytop.com/ (this site has been having some accessibility problems, lately) http://pixton.com/ (has an educational version, but that version isn't free) http://toonlet.com/ http://comiqs.com/ http://www.pimpampum.net/bubblr/ http://goanimate.com/ http://plasq.com/comiclife (download for Mac)