Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
Babyphone Wifi - This app turns your old Android phone into a baby monitor.
Restic - Easy: Doing backups should be a frictionless process, otherwise you are tempted to skip it.
Gonimo - gonimo is an open source cross-platform baby monitor.
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.
Baby Monitor 3G - Turn any two Android, iOS or Mac devices into one single baby monitor. Easy to use, reliable, feature rich and with an unlimited reach!