From Rosetta Code
This programming language may be used to instruct a computer to perform a task.
Official website
Execution method: Interpreted or compiled
Garbage collected: Yes
Parameter passing methods: By reference, By value
Type safety: Safe
Type strength: Strong
Type expression: Implicit
Type checking: Dynamic
See Also:

Listed below are all of the tasks on Rosetta Code which have been solved using Ol.
Your Help Needed
If you know Ol, please write code for some of the tasks not implemented in Ol.

Ol (Otus Lisp) is a purely* functional dialect of Lisp. It implements an extended subset of R5RS Scheme including, but not limited to, some of the SRFI, open source / free software, with a permissive license.

It is small, embeddable and crossplatform.

Builds and source codes can be found at project home page or Github.

Ol is an implementation of Lisp. Other implementations of Lisp.
Ol is an implementation of Scheme. Other implementations of Scheme.