Not all of these work super well, and I definitely don’t want to live in a world where every company is doing some variation of a twee faux-vintage typographical logo (a lot of startups have already tried).
But some of these are nonetheless very, very effective — and all because of one freely available font, called Lobster 1.4:
The Lobster font.
Kinda makes you want to try redesigning logos around other fonts, too. A typeface can change a lot.