lrtable (crate; source) takes in grammars from cfgrammar and creates LR state tables from them. Few users will be interested in its functionality directly, except those doing advanced forms of grammar analysis.

One, admittedly fairly advanced, aspect worth noting is that lrtable uses Pager's algorithm to compress the resulting LR state tables. In rare cases this can provide surprising results: see Denny and Malloy's paper for more.