Bionicle (obvious, though lately I haven't been into it, for reasons that are also obvious), Transformers (Movies, WFC/FOC, Prime), Halo, and some other stuff.
Oh, were you expecting this to be longer? It was before, but it was also out of date at that time. So, which would you prefer? :P
I've seen him on a lot. He just doesn't make comics anymore. I don't think he should anymore since he's been making them for around 6 years or more now. He deserves some rest.