Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
OpenVPN - OpenVPN - The Open Source VPN
Talkatone - Android App on. Google Play. Stop paying for cell minutes, texts & landlines; Turn your iPad or iPod touch into a phone; Call/Text even in areas with bad cell coverage; Call/Text when travelling without paying for expensive international minutes.
ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
TextMe - TextMe is a free calls and messaging application at both local and international levels.
TunnelBear - Really simple VPN to browse the web privately & anonymously.