I’ve used rubrics periodically in my classes, and often have had students themselves work together to develop them for class projects. I then have students use them to grade themselves. Ninety percent of the time I keep their grade as it is, five percent of the time I raise it, and five percent of the time a student and I jointly decide to lower it after having an individual conversation.
Once we’ve figured out what should go on the rubrics, I’ve found that Rubistar is the easiest online application to actually create a good-looking one.
There are many other rubric-makers out there, though. You’ll find four others on my Teacher’s Page under Rubrics.