grammar.txt
Parsing Grammars
readgrammar1 (source)
grammar (source)
grammar2 (source)
Simple Bottom-up Parsing
BUP1 (source)
BUP2 (source)
BUP3 (source)
Chart Parsing
Charty (source)
Charty1 (source)
Charty2 (source)
Charty3 (source)
Extra tools
list-extras (source)
You will need the grammar.txt file, the list-extras.ss file, and the grammar.scm and grammar2.scm files in the same folder where the example parsers are. Look into the header of each source file for specific instructions about how to use them.
Charty3.scm is the more advanced variant that outputs not just the chart, but also the bracketed parse tree.