Synology Note Station - Without needing to spend money on Evernote, Synology Note Station provides a desktop client to organize all your random notes in one place.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Pocket Lists - World’s Friendliest To-Do List App
Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.
Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.
FreeBu - Smart free/busy calendar sharing and meeting organizer.