We just released a new beta build of RTSS (Rivatuner Statistics Server) build 7.3.0 Beta 3. RTSS is an integral part of tweaking tools like MSI AfterBurner and responsible for the overlay, video recording, and our famous statistics server.
Among a lot of things RTSS 7.3.0 Beta 3 will introduce a new visual OSD editor. Our changes list is enormous, please do check out the download page for a full list description, and if it interests you, please do actually read it. RTSS is designed to act as a server process, which is running passively and providing different functionality (OSD rendering, screen, and video capture, benchmarking etc) to multiple client applications connected to it (e.g. MSI Afterburner).
GUI for such functionality (OSD visibility toggling, screen capture) is normally located at the client application side. Client plugins allow integrating GUI for such functionality directly into RTSS, without the need to run additional client applications, so new type of plugins is intended for those who prefer to use RTSS as a standalone solution without MSI Afterburner.