This is a much simpler virtual tabletop. If you don't need all of the features of Foundry or Roll20, this might be worth looking into.

Changing your Dungeon World fights from exchanges of damage rolls into a shifting and changing fiction is one of the biggest upgrades you can make to your GM ability. This thread has much to show you, young padawan.

Worth a watch just for the laughs, in my opinion.

Are the players too powerful when they have a +3 bonus to one of their stats? The comments give advice on ways to make encounters more challenging. Personally, I think +3 is just plain too powerful.

A generator unlike any other, Eigengrau's Generator procedurally generates towns and NPCs, all in paragraphs suitable to read out to players.

This is basically a free encounter that you can put into your Dungeon World campaign. It's very detailed and fleshed out.

This video is about GMs saying a direct "no" to players.

Ten questions you can ask your players at character creation to get them to think about the personality of their character.