One of the most popular and developed dialects in Rebol is the PARSE dialect.
Some evolutions of the PARSE dialect were introduced by a spin-off called "Topaz", which added the idea of parse expressions synthesizing a value--in addition to advancing the input. These values could then be captured by SET-WORD! (instead of capturing the parse position in the set word variable, as the original PARSE did).
Ren-C more aggressively evolved the dialect to be based on functions that could be written in userspace--a parallel to "parser combinators". This implementation is called UPARSE: