LispPad is a simple, lightweight, integrated development environment for developing and running Scheme code. The language supported by LispPad is based on the R7RS standard of the Scheme programming language. LispPad provides the following components: ? A fully integrated Scheme interpreter ? A console with a read-eval-print loop to interact with the interpreter ? A text editor for writing Scheme code, supporting syntax highlighting, smart indentation, parenthesis matching, page guides, etc. The Scheme dialect supported by LispPad provides the following features: ? R7RS-compliant libraries ? Hygienic macros based on syntax-rules ? First-class environments ? call/cc, dynamic-wind and exceptions ? Dynamically-scoped parameters ? Multiple return values ? Delayed execution via promises and streams ? Support for the full numerical tower consisting of arbitrary size integers, rationals, real numbers, and inexact complex numbers. ? Unicode strings and characters ? Vectors and bytevectors ? Text and binary ports ? R7RS-compliant records ? R6RS-compliant hashtables ? R6RS-compliant enumerations ? All R7RS libraries LispPad focuses on simplicity and ease of use. A number of standard Scheme libraries are built into LispPad to facilitate porting existing Scheme code.