Try LambAda! a lightweight, flexible language bootstrapped from the Iota combinator
Disclaimer (March 2025)
LambAda is maintained in this GitHub repo now!
In 2023 I came across Barry Jay’s tree calculus and found it to be a significantly better fit than the Iota combinator.
Check out our website for further pointers. Its interactive playground is powered by a descendent of what powers this website.