Godot Engine - Feature-packed 2D and 3D open source game engine.
Digit - SMS bot that monitors your bank account & saves you money
Unity - The multiplatform game creation tools for everyone.
Olivia - Your new best friend built with an artificial neural network
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Spendee - See where your money goes