Teamviewer
Teamviewer tries to separate itself from the competition by adding features that focus on collaboration and presentation, but it is still at its core a remote desktop tool that enables administrators to manage remote machines or for employees to access their desktops on the go.
To ease connecting, Teamviewer uses its own routing servers to mediate handshakes between machines, but then passes this off to a direct connection. The use of a routing server makes it possible to connect machines behind firewalls, as both sides connect first to the routing servers to get a unique ID (randomised every time), which in turn gives the servers the IP of each machine. Users can then identify the machines they want to connect by the unique ID, and Teamviewer takes care of the rest.
Security wise all connections are encrypted with 256-bit AES as you might expect, and beyond password identification optional two-factor authentication can be established through the use of a mobile app that can generate a one-time code.
For its collaborative tools, Teamviewer incorporates an in-built chat client and address book functionality for known users and machines. Voice chat is also supported along with clipboard to clipboard sharing, file transfers, and remote device access. Sessions can also be shared among multiple users, making it possible for example for a third party to join and both view or control a remote machine along with another user, a function which could be helpful in training sessions or remote presentations. Sessions can also be recorded for later playback, and a stand-alone 'QuickSupport' program allows a user to accept an in-coming Teamviewer connection without the need to install the full Teamviewer client.
Extending base functionality for corporate installations an optional central browser-based management console can be installed for managing Teamviewer machines. Operating system support is excellent with clients available for Windows, MacOS X, Linux, iOS, Android, Windows Phone 8 and Blackberry.
3. NoMachine
4. Splashtop
5. GoToMyPC
6. LogMeIn
7. AnyDesk