Hydra is an HDL based on the functional programming language Haskell.

JHDL is a method of describing (programmatically, in JAVA) the components and connections in a digital logic circuit.

MyHDL is a Python package for using Python as a hardware description and verification language.

Oroboro is a testbench and modeling language that uses Python generator functions.

As the name implies, Perilog uses a mix of Perl and Verilog to construct parametric hardware designs.

RHDL (Ruby Hardware Description Language) is an HDL based on the Ruby programming language.