What is ANTLR? ANTLR, ANother Tool for Language Recognition, (formerly PCCTS) is a language tool that provides a framework for constructing recognizers, compilers, and translators from grammatical descriptions containing Java, C #, or C actions. ANTLR provides excellent support for tree Construction, Tree Walking, And Translation. There Are Currently About 5,000 ANTLR SOURCE DOWNLOADS A MONTH.
http://www.antlr.org/download.html
