The Kraken Programming Language
(more information online at http://kraken-lang.org/ which is also under construction / needs to be updated / has a try-it-online feature for an older version without partial evaluation)
Currently developing the third iteration, a Scheme-like based on a functional Vau calculus partially-evaluated for efficency and compiling to WebAssembly.
Heavily inspiried by John Shutt's thesis: https://web.wpi.edu/Pubs/ETD/Available/etd-090110-124904/unrestricted/jshutt.pdf with partial evaluation during compilation to make it efficient.
koka_bench: Licensed under Apache-2.0, as they are derived from the benchmarks of the Koka project, see the readme and license in koka_bench for more, or https://github.com/koka-lang/koka for the source project.
Kraken (everything else besides the benchmarks in koka_bench, and Recursive/CodeJar/Highlight.js in website/) Licensed under SPDX-License-Identifier: BSD-2-Clause-Patent
Note: This license is designed to provide: a) a simple permissive license; b) that is compatible with the GNU General Public License (GPL), version 2; and c) which also has an express patent grant included.
(Note taken from https://opensource.org/licenses/BSDplusPatent )