Shrib - Take notes online. 'Free and no login' or 'AI assistant, visitor stats, privacy and productivity': super simple, with publishing and markdown, share to all devices.

Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.

aNotepad - anotepad.com is an online text editor that you can write notes and anotepad also has great stability

ChatSecure - ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.

notepad.pw - notepad.pw is a online notepad which allows you to save your text in the cloud with features like

Otr.to - A secure peer-to-peer chat in your web browser.