What Sponge Is EXACTLY?

[simon816]

I feel like I’ve seen an identical question to this

What exactly is Sponge?

The other day I was wanting to make my personal hosted server Bukkit so that I can use plugins. The only problem was I needed this thing called MCPC+ or Cauldron. I looked up Cauldron and on the website, there was no download links for 1.7.10 let alone, any. Then, I come across this thing called Sponge that is supposed to “replace” Cauldron (If I am correct.) At this point I do not understand why they took down the Cauldron download links. I just want to play my Forge server with Bukkit. So my …