Couldn’t find any open source ones on google. So your options are.
1. Find someone selling one. Be careful not to get scammed, and make sure the person knows what they are doing. You Will likely want to change and implement new features. So you should still know how to program, otherwise you will be dependent on paying people to built features. Also don't buy from Mr. Razo.
2. Learn to program and build your own. Theres tones of open source ones around that you can learn from. Its also a lot of fun, and if you enjoy it, you might want to consider doing software development professionally
