PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
Gab - Gab is an ad-free social network dedicated to free speech.
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
Friendica - Decentralisation - Privacy - Interoperability
Standard Notes - A safe place for your notes, thoughts, and life's work