A generator for LR(k) and SLR(k) parsers in Scheme. The generated parsers perform error recovery, and are highly efficient. They result from the general parser by an automatic program transformation called partial evaluation. This guarantees consisten...

A portable debugger for the Scheme language. It presents the user with an interactive interface that lets him or her examine and change values of variables, set breakpoints, and single step evaluation. Psd is designed to be run within GNU Emacs, which...

An embedding of Prolog-style logic programming in Scheme. Prolog-style and conventional Scheme code fragments can be used alongside each other.

A functional Scheme based XML parsing framework consists of a (semi-validating) DOM/SXML parser, a SAX parser, and a supporting library of lexing and parsing procedures.

A CLOS-like Object System for Scheme.

A version of AWK in the Scheme programming language. It goal is to offer the same features as awk to scheme programmers.

A permissive HTML parser for Scheme that emits SXML format so that real-world HTML can be processed with XML query and transformation tools.

HITCH (HIghlighT CHanges) highlights changes between two sets of HTML pages in red. INFOBAR annotates changes between GNU Info files with change-bars.

An extension of the Scheme programming language to support research in computer vision.

For DrScheme, semi-structured program editing; an alternative set of key bindings. When it is on, the most important functions can run via unchorded keystrokes, and motion commands work on sexps by default.