µTox the lightest and fluffiest Tox client
Topsi
A Desktop Kanban board app.
Delta Chat
Delta Chat is like Telegram or Whatsapp but without the tracking or central control.
Open ToDo List
A simple Todo and task management application
Zettlr
A Markdown Editor for the 21st Century
Gnome Photos
Access, organize and share your photos on GNOME. A simple and elegant replacement for using a file manager to deal with photos. Enhance, crop and edit in a snap. Seamless cloud integration is offered through GNOME Online Accounts.
Sylpheed
Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client.
Geary
Geary is an email application built around conversations, for the GNOME 3 desktop.
Dino
Dino is a modern open-source chat client for the desktop.
Agenda
A simple, fast, no-nonsense to-do (task) list.