Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
OneLogin - On-demand SSO, directory integration, user provisioning and more
TextMe - TextMe is a free calls and messaging application at both local and international levels.
TeamPassword - TeamPassword helps you manage and share access to the apps, services, and tools your team needs to keep projects moving.
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.
Teramind - Teramind provides a user-centric security approach for monitoring.