eHarmony -- Self-proclaimed "number one trusted relationship site."

Match.com -- The other big dating site. Also see their sister site chemistry.com

OkCupid -- A free dating site. Also try plenty of fish featuring forums...

VIP Singles -- Site for successful, relationship-minded professional singles.

singlesnet -- Online service with a free trial offer. No credit card required.

Lavalife -- Despite being targeted to "sophisticated, savvy urban singles," has some decent advice and articles via its magazine Click.

Mature Singles -- Screened service with focus on "meaningful long-term relationships."

perfect match -- 'Executive' matches using the Duet® Total Compatibility System featuring Dr. Pepper Schwartz.

Dating Sites Reviews -- Helps match you with online matchmakers.

Smooch.com -- "Free" Online dating site for U.S., U.K., Ireland and Australia

Savvy Miss -- Online community with the usual advice features for women who are "interesting and interested" and "mix a mean cocktail."

Ask Dan and Jennifer -- Web-based dating, love and sex advice column. Videos. Moving on "from outdated ideas about relationships and sex."

Ask Men -- Online men's magazine. Ask Men's dating and sex advice is frequently consulted by women's sites and publications. Just saying.

iVillage -- All love-and-relationship Google searches inevitably seem to lead to here.

Go Ask Alice -- Columbia University's nationally known question-and-answer resource for all things pertaining to health, sexuality and relationships.

MarsVenus.com -- Site of John Gray, Ph.D. of Men Are From Mars, Women Are From Venus. Advice, forums, coaching, free online dating (and of course the opportunity to buy his books).

The Bathroom Door Rule -- "Where men and women discuss everything about dating, relationships, marriage, and breakups." Infrequently updated but non-saccharine.

Breakup Girl -- Advice, news, comics and humor...BG "uses her wit, wisdom, and utility fanny pack to help women and men ..."

Men's Health -- Where you can go to not only learn about the latest gadgets but also to "decode her."

eNotAlone -- Relationship resources, articles, forums. Also see gay.com for alternative communities, or Christian Singles Blog

Baggage Reclaim -- Are you dating an assclown? UK-based site with a focus on "Mr. Unavailable." But not bitter! Excellent links section, blogs off the beaten path.

Savage Love -- Dan Savage's column and podcast. A staple in alternative weeklies across the US.

Don't Date Him Girl -- The infamous public shaming site of scoundrels. Also advice, etc.

e-closure.com -- "Documenting breakup letters anonymously online."