iburg is a program that generates fast tree parsers for cost-augmented tree grammars. iburg is useful for writing code generators and for teaching computer science compiler courses. A variant of iburg is used in the code generators for lcc, a retargetable compiler for ANSI C. iburg is described in

C. W. Fraser, D. R. Hanson, and T. A. Proebsting, Engineering a Simple, Efficient Code Generator Generator, ACM Letters on Programming Languages and Systems 1, 3 (Sep. 1992), 213-226. PDF.