Ulterius is described as 'Complete control of your desktop — from your browser' and is an app in the Network & Admin category. There are more than 10 alternatives to Ulterius for a variety of platforms, including Windows, Linux, Mac, Android and iPhone. The best alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try UltraVNC or Webmin. Other great apps like Ulterius are NoMachine (Freemium), VNC Connect (Freemium), TigerVNC (Free, Open Source) and Remotely (Free, Open Source).
UltraVNC is easy to use and free software that can display the screen of another computer (via the Internet or a local network) on your own screen. The program allows you to use your mouse and keyboard to control the other computer remotely.
VNC is remote access and control software which allows you to view and fully interact with one computer desktop (the "VNC Connect") using a simple program (the "VNC viewer") on another computer desktop or mobile device anywhere on the Internet.
TigerVNC is an advanced VNC implementation. It is based on the fourth generation of VNC. TigerVNC also includes features from the TightVNC and TurboVNC projects. This includes accelerated JPEG compression. TigerVNC supports the latest X.Org X server.
Clientless RDP Server Manager. The Windows Server acts as a gateway, while the HTML5 web rdp client grants secure remote desktop without installing extensions nor plugins on the user side. Includes FTP, remote audio/printing, access profiles, etc.