Read-Compile-Run-Loop: tiny and powerful interactive C++ compiler (REPL)

Attach Java 9's JShell to already-running virtual machine

Writing an Interpreter in Go

REPLICA: REPL Instrumentation for Coq Analysis

Purple, the PHP REPL

Simple REPL implementation for C++.

hosts raven interactive interpreter (REPL)

Universal toplevel (i.e., Read-Eval-Print Loop or REPL) for OCaml

A mini-shell that reads and evaluates simple commands. Parsing involves a trivial lexical and syntactical analysis of the command, evaluation involves finding the corresponding binary on the machine and executing it, or executing the concerned code in the case of "built-in" commands to the shell