Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

MemberVault - MemberVault is a flexible platform that helps you to create, deliver, and sell your services, courses, memberships, subscriptions, etc.

Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Ruzuku - Ridiculously easy online courses

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.

Opentute - Opentute helps businesses to effortlessly launch a private eLearning and communication platform to engage teams and clients.