Welcome to TianoCore, the community supporting an open source implementation of UEFI. EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. We hope that you’ll review our documentation, use TianoCore for platform firmware, report any issues you find, and contribute to the community.
If you want to compile firmware or utilities, we recommend the Getting Started with EDK II page. This provides an overview of downloading EDK II from github and building a sample platform (NT32, OVMF, ArmVirt, MdePkg, …). You can also use a UEFI Development Kit (UDK) release, which is a stable snapshot based on EDK II.
There are multiple hardware platforms using EDK II open source UEFI firmware, including MinnowBoard Max/Turbot, MinnowBoard 3, and Intel® Galileo Gen 2. This allows you to experiment and develop UEFI features on real hardware.