Quite a few, actually! We've tried (and continued to use) Revlon PhotoReady Perfecting Primer. It's got a great texture—a light fluidity that makes for even coverage and a smooth base without feeling like you're spackling over your pores. There are other, more multitasking options, though, too. Physicians Formula Correcting Primer 3-in-1 Corrector + Primer + Sun Protection is a good one if all you want to put on top is a light layer of foundation or concealer. If “natural' stuff is more your bag, you might want to take a gander at Palladio Herbal Liquid Foundation Primer. We don't know that it's actually more than marginally herbal, but it definitely does the job.