This is the latest and best made of the RPG Makers from Enterbrain.

User Rating: 9 | RPG Tsukuru XP PC
I bought a license for the game after i had been playing with it for just about a week, I was very impressed with the way the user interface worked and looked.
And it was not very hard to make a basic map or even a basic game. The more advanced features take time to learn through some trial and error. I would suggest that you do a lot of preplanning on how you want the map and overall game to look and also it helps to have a story in mind. Just going at it randomly can work but is not as good. i would also suggest to have some writing materials nearby to take notes with. Its very much worth the price and has an almost endless amount of replay time.