Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
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.
Ralpha Image Resizer - High-speed image batch conversion tool