I’ve released a new package on the Unity3d Asset Store, called Dungeon Editor.
The Dungeon Editor is a tile based editor which allows easy placement of dungeon pieces like floors, walls, doors and various pieces of décor.
The editor could be used to streamline development or by your players to create maps. There is a sample of saving and loading to/from PlayerPrefs. Maps are saved by simple string encoding. All code is done in C#