Kiwi application monitor - Kiwi application monitor is a small program which lets you monitor your applications/processes, Windows and User activity.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Battle Encoder Shirase - Software that controls per-process CPU usage: an “active” software CPU cooler.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Processes - https://www.oneperiodic.com/products/processes/
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.