BLLIP Resources, including the Charniak (2010) top-down parser, and the Charniak (2000) parser and Charniak and Johnson (2005) parse reranker.
Dan Bikel's parser, including Collins parser emulation.
The Berkeley Parser, developed mainly by Slav Petrov.
MSTParser, developed by Ryan McDonald and currently maintained by Jason Baldridge and Ryan McDonald.
MaltParser, developed by Johan Hall, Jens Nilsson and Joakim Nivre.
C&C parser, the Clark and Curran CCG parser.
Enju, a data-driven HPSG parser from the University of Tokyo's Tsujii Lab.
CoNLL Shared Tasks, including multilingual parsing (2006, 2007) and joint parsing of predicate-argument and syntactic dependencies (2008, 2009).