UltraVNC (sometimes written uVNC), an open-source remote-administration/remote-desktop-software utility for Microsoft Windows. Developed by UltraVNC
License: Open Source
UltraVNC is a versatile remote desktop solution with extensive features, including file transfer and cross-platform support, while rdesktop is optimized for lightweight performance in Linux environments but lacks some advanced features. Users should choose UltraVNC for rich functionality and cross-platform needs, whereas rdesktop is ideal for straightforward remote access on Linux systems.