My current favorite browser games:

 

Tattered World - Awesome game :) great character customization, fun games to play & earn shards to buy stuff with in game, cool pets

Lionden - lion breeding game, pretty cute so far, lots of stuff to do (hunt/explore/etc), mini-games. Automatically goes on vacation mode if you can’t make it on so your lions don’t starve or anything. In game currency seems a little harder to get but you can sell your extra items from hunting.  Invite code:  8qot4po7ib or use my name Nilamarie

Wolvden - Very similar to Lionden but with wolves.

Drakor - Really enjoying this text based RPG. There is combat, lots of crafting and resource gathering skills, you can have pets and mounts, guilds. There are a lot of afk activities. Basically everything except combat is doable afk. The combat system is pretty interesting.

The West - wild west themed RPG, can craft, do jobs/quests, fight bandits or other players, join towns (like a guild)

Fallen London - text based, old London RPG, kind of like Sherlock Holmes world

Flight Rising - dragon breeding game, lots of things to do, you can even play Mahjong & some other mini games for coins to spend in-game. You join a guild by choosing your element- mine is water. You can add me if you want, Nilamarie is my in game name.

The Grail Lords - I am enjoying this Medieval browser text based game. There is combat, crafting and farming. It is the type of game where you just need to go in once a day to use your stamina. Your character also should eat every day and take care of any farm animals you have.