TeamViewer Portable; is a popular all in one (server and client) Portable Remote Desktop Program. It can be used for desktop remote control and desktop sharing. One key feature that differentiates Portable TeamViewer from other remote desktop utilities and tools is that it will also work behind a firewall or NAT proxy. As a result, it's easy to get your desktop up and shared quickly.
Moreover this RDP is entirely free for personal use. While license purchase options are available as well for commercial use.
TeamViewer Portable Remote Desktop
Extracted Size: Roughly 60MB
Authors Website: TV Project Page
Supported OS: Windows 11, 10, 8, 7, Vista, XP
License: Freeware (for non-commercial use only)