Is there a good scripting Pascal-like language for Delphi?

The Jedi JVCL also includes TJvInterpreter which is a very lightweight (small) interpreter, but with much more limited features than dwscript.

For very small (User entered formulas, or simple string and numeric processing tasks) JvInterpreter has worked quite well for me.

Try the dwscript library which is currently maintained by Eric Grange.

Few years ago I used to work with Pax Compiler in combination with this Forms Editor.