ATP Projects: Original English dating sims, complete and free (no work-in-progress, no demos).
English Bishoujo Games Encyclopedia: Index of all "girl-game" dating simulations in English.
Everything I Needed to Know, I Learned by Playing Japanese Dating-Simulation Video Games: Dating sim humor.
Four Days in Ohtori: A dating sim for girls based on the popular Revolutionary Girl Utena anime series.
Game Tour: World Neverland Plus: Review. "A traditional RPG type game (fighting monsters, gathering items and such), with the addition of dating sim elements and the ability to make your living in a mundane way."
Kari - Virtual Girlfriend: Kari is the most advanced girlfriend simulations to date. Kari is an artificial intelligence entity which can learn and have a real conversation with you.
Lemma Soft Forums: Discussion of fan-made dating simulations and about software for making your own.
Love Revolution - The Dating Sim Project: Developing a dating sim completely in English. Includes forums, screenshots, and downloads.
Megatokyo: Dating Sims and Visual Novels Forum: A web forum on dating sims, on the site of the Megatokyo webcomic.
My Sweet Valentine: An article on the dating sim genre, plus reviews of many dating sims, including Tokimeki Memorial.
Ren'ai Archives: Free, English dating simulations for download. Created by American and British fans of the genre.
Transreality Simulations: Australian shopping site for dating sims and visual novels.