UltraGrid is a software for video transmission over networks in high quality but with low latency (as low as 83ms). It allows high-definition streams (PAL/NTSC, HD, 2K, 2160p, iHDTV, QuadHD, SuperHD, 4K video). It supports SAGE, OpenGL and SDL displays, DXT-compression per GLSL, JPEG compression via CUDA, permits to utilize HDMI and HD-SDI cards, system audio or JACK sinks, and even provides 3D support.
Attract-Mode is a GUI for game system emulators such as MAME, MESS and Nestopia. It abstracts the operating system, can be navigated per joystick, gamepad and spin dial. It's thus suitable for cabinet installations, works on Linux, OS X and Windows; is scriptable per Squirrel, provides a configurable menu, screensaver and background music, has a convenient history and play or score statistics.