For jedirita, who bookmarked my post on slings.

[conuly]

A whole lot of blog posts detailing different types of carriers and when they're used and whatnot. Minor quibble - I'm assured that you don't have to use your hand to support a baby in a ring sling, not most of the time. In some positions, and if you're not doing it right, but not mostly.

Of course, just when you think you're clear on the different options, you learn about one you've never heard of! So don't take this or any site to be totally comprehensive.