This is my very first project I publish on itch.io. It is a 3D map editor I made with my own 3D OpenGL library. It is actually really easy to use which is what it was intent to. Besides that I got nothing much to say about it. Be aware that you need a graphic card that supports OpenGL 3.0 or higher in order to use it! Below is a basic screenshot.
Url to my itch.io page: https://thebonejarmer.itch.io/map-editor