lightJacc is a small but strong grammar parser generator. It adopts a parsing strategy of its own: dynamic concurrent parsing -- which made it much stronger than LR or LL family CCs (YACC, ANTLR, etc), but still keep good performance.
Polar is a scripting language spun off from PHP, developed from the version 4.4 codebase. The aim of the project is not to compete with the official endeavor. Rather, our desire is to explore other possibilities.