dropincc.java is described as '- A small and easy to use parser generator. Specify your grammar in pure java and compile dynamically. Especially suitable for DSL creation in java' and is an app in the Education & Reference category. There are four alternatives to dropincc.java for Linux, Mac and Windows. The best alternative is ANTLR, which is both free and Open Source. Other great apps like dropincc.java are parboiled (Free, Open Source), textX (Free, Open Source) and Owl parser generator (Free, Open Source).
ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from grammatical descriptions containing actions in a variety of target languages.
textX is a meta-language for building Domain-Specific Languages (DSLs) in Python. It is inspired by Xtext. It will help you build your textual language easily. You can invent your own language or build a support for an existing textual language.