Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.

Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...

snaprd - Snaprd is a program that helps you to make snapshot backups using rsync.

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.

rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.

GMinder - GMinder is an open source Windows System Tray app that pops up to remind you about Google Calendar events.