Radmin (short for Remote Administrator) is a powerful remote access tool that enables users to connect to and control computers from a distance, developed by Famatech from United Kingdom. Designed for IT professionals, system administrators, and support teams, it offers a robust suite of features that facilitate efficient remote management and support.

Ammyy Admin is a tiny and easy-to-use remote desktop connection application for Windows, developed by Ammyy from Russia. It allows users to access and control a remote computer over the Internet or local network with ease. It can be used for various purposes such as remote administration, remote assistance, remote work, remote collaboration, file transfer and desktop sharing.

AirDroid is an application that allows you to manage and control Android and iOS smartphones through a client or a web browser on your computer and wireless network, developed by Sand Studio from China. It can manipulate your phone's address book, transfer files, upgrade apps, and receive/send SMS and emails remotely and in real time. Although it's almost functionally indistinguishable from other similar applications, thanks to its B/S architecture, it has no operating system limitations (i.e. it's cross-platform), which is a boon for Mac and Linux users.

No doubt, TeamViewer is an excellent all-in-one solution for remote control and online meeting. Sure there are also lots of similar good software, such as AnyDesk, ScreenConnect, Anyplace Control, PCAnyWhere, etc. But finally I would say TeamViewer does the best on a whole level.