NVC is a VHDL compiler and simulator. NVC supports almost all of VHDL-2008 with the exception of PSL, and it has been successfully used to simulate several real-world designs. Experimental support for VHDL-2019 is under development.
NVC has a particular emphasis on simulation performance and uses LLVM to compile VHDL to native machine code.
NVC supports popular verification frameworks including OSVVM, UVVM, VUnit and cocotb. See below for installation instructions.