Apps similar to Dart RPG include RPG Paper Maker, which is free for personal use. Other options are RPG Maker, Joiplay, Adventure Game Studio and EasyRPG. You can choose from more than 10 Game Development Tools like Dart RPG for Windows, Linux, Mac, Android and the web.
RPG Paper Maker is a free game maker engine including a 3D universe with many 2D sprites and some simplified 3D objects. Pretty close to the RPG Maker series, RPG Paper Maker finally give a way to create RPGs in a totally 3D universe as easy as it is in 2D!
Suite for building 2D top-down role-playing games with detailed map, tile, and sprite editors, traditional turn-based mechanics, dialog and encounter tools, custom scripting, asset support, and publishing options, suitable for both beginners and advanced users.
Japan
JoiPlay is a game launcher for Ren'Py, RPG Maker XP/VX/VX Ace/MV/MZ, TyranoBuilder and HTML5 based games
Adventure Game Studio (AGS) - is the IDE and the engine meant for creating and running videogames of adventure (aka "quest") genre. It has potential, although limited, support for other genres as well.
United Kingdom
EasyRPG is a project aimed at producing a free and open source role playing game interpreter and editor compatible with RPG Maker 2000 and 2003.
Open RPG Maker is a free and open source clone of features from the RPG Maker series (i.e. rpgmaker200, rpgmaker2003, rpgmakerxp), as well as many other features. All of the data files are in XML format and are easily editable with any text editor.
United States
The RPG Toolkit is a free, open source project delivering a simple, flexible and powerful tool for the creation of role-playing games on your personal computer.
Make your own Role Playing Games, fast, easy and for free.
Netherlands
EU
RPGWizard is an open-source 2D game creation tool that specializes in making RPGs. It comes with a graphical editor and browser based game engine, both of which are completely free-to-use.
RPG 20XX is a redesign of RPG Maker 20XX... Which was an upgrade replacement for RPG Maker 2003's engine. This newer engine will have nothing to do with the RPG Maker series of engines apart from the familiarity of the editor and engine features.
