- Turtle push/pop functions.
- New examples.
- Minor fixes.
- Documentation and user manual.

- New examples.
- Fixes for expt function.

- Turtle & logo language.
- Inspector editor.
- Editor tweaks.
- New examples.
- Minor fixes.
- Documentation and user manual.

- Inspector window.
- Debugger.
- New examples.
- Minor fixes.
- Documentation and user manual.

- New radix library file.
- New examples.
- Fix unicode characters handling.
- UI fixes.
- Documentation and user manual.

- User interface changes.
- New examples files.
- Minor fixes.
- Documentation and user manual.

- Fix strings handling.
- Fix printing of self-referencing expressions.
- New OPTIONS::KEYBOARD-MODE option function.
- Documentation and user manual.

- Implicit PROGN in DEFINE.
- New regression tests files.
- New Primes.lisp file to work with prime numbers.
- New number theory functions in Math.lisp.
- New Egytian fractions algorithms.
- New Tools.lisp functions borrowed from Maclisp and Le_Lisp.
- New Tools.lisp function sys::print-values.
- Change SICP filter to sicp::filter to avoid conflict with library.
- Minor fixes.
- Documentation and user manual.

- Integers and rationals.
- READ with parameter.
- Fixes: SET!, LIST->STRING.
- Changes: dictionary functions.
- UI changes and fixes.
- Documentation and user manual.

- New repeat and repeat-eval user functions.
- New examples from Le Lisp user manual.
- Faster I/O engine.
- UI changes and fixes.
- Documentation and user manual.

- iOS/iPadOS 15 support.
- UI changes and fixes.
- Documentation and user manual.

- New output options.
- Drag&drop support.
- UI changes and fixes.
- Documentation and user manual.

- Editor search/replace commands.
- Editor comment/uncomment commands.
- Editor lines toggle option.
- Universal application.
- Minor fixes.
- Documentation and user manual.

- AND and OR revision.
- New SICP examples.
- Minor fixes.
- Documentation and user manual.

- SYS::TRACE and SYS::UNTRACE functions.
- New trace options.
- UI changes and fixes.
- Documentation and manuals.

- New reference manual.
- New SICP examples.
- UI changes and fixes.
- Documentation and user manual.

- Indentation shortcuts.
- UI changes and fixes.
- Documentation and user manual.

- Keyboard shortcuts.
- Mouse support.
- Line numbers in editor.
- Bug fixes.
- Documentation and user manual.

- Closure function.
- Le_Lisp example file.
- Bug fixes.
- Documentation and user manual.

- Numbers output format.
- Bug fixes.
- Documentation and user manual.

- Lambda Calculus library file.
- MacLisp and Lisp 1.5 examples.
- Sorting examples.
- Stack and dictionary examples.
- Reorganization of examples and libraries.
- Minor fixes.
- Documentation and user manual.

- New trace mode.
- != comparison.
- Math comparison operators extended to all expressions.
- New sample files.
- Minor fixes.
- Documentation and user manual.

- DEFINE with default values.
- SET! on specific environment.
- SET!!, SUBST and SUBST*.
- Symbolic derivation fixes.
- Documentation and user manual.

- Dotted pairs parsing.
- UI changes and fixes.
- Documentation and user manual.

- Commands history.
- Stack overflow management.
- Disable read/only mode upon loading user file.
- SET! now works with formal parameters.
- Minor UI changes and fixes.
- Documentation and user manual.