Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Duplicacy - A new generation cross-platform cloud backup tool
Calendar Lock PEA - Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.
Time Machine - Time Machine is the breakthrough automatic backup that’s built right into Mac OS X.
GMinder - GMinder is an open source Windows System Tray app that pops up to remind you about Google Calendar events.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.