What are some App development Templates available online to make app development easier?

Question

I know about WordPress,Shopify etc that make the task of Web Development easier.Is there anything similar in app development?
it would be good if it was for free. :)

Answer 1

I think there is game engines available online for game development for many languages which implement a lot of functionality needed in game development. Just pick a programming language and search of its game engines. For example, python, there is pygame. C++, there is SDL, SMFL, ....
There is a complete list on wikipedia for game engines. Most of them are free.
I hope this helps.