Recommended and mentioned products
The app for lesbian, bisexual and queer people
I've been recently trying HER and I like it a lot. It's probably about half cis lesbians, but also lots of trans/nb folks and other queers too.
OkCupid Free Online Dating - The fastest growing free dating site for singles.
OKCupid is also fine. A little dated, but the old standard with lots of gender/sexuality options (including the ability to be invisible to straight people).