DungeonGraph

Included:

Dungeon Graph Editor Tool

Using Unity's GraphView, you can create and connect nodes together. There are several default node types, but you can create custom nodes as well. Within the DungeonGraphView, there are several settings that allow for plenty of experimentation as far as room layout goes. The room assets are pulled from a specific place in your filespace which you can edit in DungeonFloorManager.cs. You can create and switch between dungeon floors, which will allow you to quickly iterate on level creation.

Room Editor Tool:

Using 2D Tilemap Editor, you can create rooms just as you would any other sprite-based game, but now you can save the room as a RoomAsset, which is then pulled during generation.