GitJournal - Manage your Notes from any Git Repo.
FlowNote note manager - Simple and fast note taking app for the web.
Calendar Note by Enex - Calendar Note app allows users to view the calendar so they can write notes and memos according to dates to get alerts about tasks.
Category Tabs for Google Keep - Better organize your Google Keep Notes
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Floating Notes - Floating Notes app enables users to create sticky notes to view all their daily tasks on the home screen, so they don’t forget anything important.