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It is a cross-platform mobile messaging app for iPhone, BlackBerry, Android, Windows Phone and Nokia. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other media.

Since RingCentral is cloud based, you enjoy the freedom to connect and manage multiple locations, devices and workers within your cloud phone system. You can easily customize users, departments, and call handling rules. No matter where you, or the users, are. You only need a high-speed Internet connection and your phone system is ready to work lightning fast, anytime and anyplace. There’s no PBX hardware.

Aircall is an app that you can install and setup in a few minutes. It lets you buy one or several phone numbers across the world, add teammates to your dashboard, and place & receive calls on your existing devices. Everything is managed inside the Aircall app.

It is an open standards IP PBX that offers complete Unified Communications, out of the box. Suitable for any business size or industry it can accommodate to your every need; from mobility and status to advanced contact center features and more, at a fraction of the cost.

It is a graphical programming interface that provides designers access to parametric modeling and data-driven customized workflows for building information modeling (BIM). It can run as an addin for Autodesk Revit and Autodesk Vasari, with the ability to manage Revit project files and family definitions, or it can run as a standalone program. It allows users to control complex geometry, construct parametric relationships, manage data, and automate tasks.

It is a pure-cloud business communication platform that's in tune with the way your team works . Connect your team with a business communication platform that powers voice, video, messages, and meetings across your existing devices.

It is a cross-platform messaging app. Privacy isn’t an optional mode – it’s just the way that Signal works. Every message, every call, every time.

It is a cross-platform instant messaging and voice over IP application provided as freeware for the Microsoft Windows, macOS, Linux, Android and iOS platforms.

Sound more professional and stay connected with Grasshopper, the Virtual Phone System designed for entrepreneurs. Grasshopper works just like a traditional phone system, but requires no hardware to purchase or software to install.

Stay connected, organized, and on task with an easy-to-use phone solution that fits organizations of any size.

SendHub is a simple, fast, web and mobile communication tool that provides businesses, and organizations, with a call and messaging solution to reach small and large groups of people.

All-in-one phone system for startups and small businesses. It adds a work phone number to your existing devices. No need to carry two phones or extra SIM cards.

It is an Intelligent Phone System for run companies by managing call and forward to anyone. It is very helpful to build a relationship with clients

It is an Internet-based phone network that enables clients to make and receive calls from any device connected to the Internet. It enables you to setup your business telephone system without the heavy hardware and wiring expenses.

Create unique conference rooms on demand, without having to reuse the same IDs. Self-hosted free option works for most, but commercial licensing is available for more features and support.

It offers a solution where you’d get a business phone number with lots of great features without having a full office setup, extra cell phone plan, and without paying high prices for the communication system.

It is a modern VoIP phone system for better call automation, collaboration, and productivity. It is a cloud phone system that integrates with 100+ business apps.

It is a sales productivity phone service that makes all of your calls searchable, trackable, and archived in your CRM sales.

It is an automation platform that brings provisioning, compliance, SQL reporting and remote phone management to another level. It provides a no-touch or limited touch approach to securely, efficiently and consistently on board and off board users across Cisco Collaboration applications (CUCM, CUCN, UCCX, UCCE Packaged, CMS, IM&P, Webex Teams).