Ace of Spades is a combat game that takes the mechanics of Minecraft and combines it with a Counter Strike like shooter. It has some tools and customization as far as building or editing the map while playing online with others as well as a few different weapons to use.
Manic Digger is a "Minecraft Clone" so to speak with a few differences than Minecraft. It has a few gun types as well as class types that you can mess around with. Also supports mods.
Cubeland is a Browser Based game that allows for online gameplay almost like an MMO style game. It has few similarities to minecraft but Graphics is not one of them. It allows for item and housing placement on a limited world as players can mine out and create what they wish. Also supports a money shop to customize there profile.
Terraria is one of the best 2D side Scroll Sandbox games out there as of right now. It gives the player room for tons of options as far as single player, multiplayer and server options. The effects may be a little lacking but dont let this game fool you.
Blockland takes on the appearance of the popular toys called Legos. This game provides many types of items that can be used to build your own land either in single player or multiplayer. Allows up to 16 players in game. This game also offers many game types that allow for combat.
I do have a list of games, I will update the list with more games pretty soon as atm I do not have the time to do so. There probably are about 30 or so PC type games and 6 Xbox 360 type games that I have found and researched. I have also played most of these games.
I read the thread, but what do you think it's the point of this? I saw lots of thread like this, saying that Minecraft is copying other games or vice versa. It's getting boring,
Some of us like playing different yet similar games. Just because someone is making a list does not mean they are complaining. In fact the only one complaining here is you. As for similar games, Wurm is one that Notch worked on before minecraft. its different yet the same concept. They actually both compliment each other pretty well. (put down the pitchforks I am not getting into the wurm/minecraft debate I am just mentioning it)