Hot on the heels of my Games Like Minecraft / Minecraft Clones post where I detail a huge list of (sometimes free!) games that are just like Minecraft or Minecraft with a twist, this post is the more of the same except for games that are like Terraria. There aren't nearly as many, but there are a few. And, like my other "Games Like" posts, this one will be updated all the time as we go along.
If you've found a Terraria clone that's not on this page, let me know in the commens below and I'll add it!