iMazing Mini - Back up your devices automatically, wirelessly & privately
Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
Rebel Backup - Rebel Backup lets you make encrypted backups of your important files to Dropbox or Google Drive.
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
Online Vault Backup - Online Vault Backup is a cloud storage service that allows you backup your data while having unlimited storage.
tSIP - tomeko.net/software: SIP client for Windows.