Donating
Note, to prevent people from messing with donation links this page is protected. Want to be added to the list/removed/have a new link? Contact me - Soyweiser (contact info is here) (or leave a message on my talk page.
Don't have much time or programming skills? But you do have spare money? You can always help by donating. First, you can donate to Chesthole/Chezzo's patreon. He generously hosts this wiki, the item browser, creates tilesets and more.
Second, you can use the github bounty system. Where you put bounties on certain pieces of improvements you want to see to the code. And if somebody implements them, they get the monetary reward. While this is no guarantee somebody will implement the thing you want, it will at least be a little bit more appealing.
Lastly, you can always try to contact Kevin Granade and directly donate to him, or the project. He is generally available at the various community locations listed above. He can be a busy man however, so don't expect instant reactions.
So in short: