Better Notes - Simple notes app that ties notes together with #hashtags
Cryptee - Cryptee is a safety and privacy focused, encrypted and cross-platform personal data storage service. You can write personal documents, notes, journals, store photos and all sorts of other files.
Dclouds - Blockchain-based alternative to iCloud.
NoTer - A lean, secure and social media-less repo for your ideas
Standard Notes - A safe place for your notes, thoughts, and life's work
Serenity Notes - End-to-end encrypted collaborative notes app