Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Godot Engine - Feature-packed 2D and 3D open source game engine.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
Construct 2 - Scirra Construct is a 2D game development engine with a focus on building games visually.