Nobody's mentioned Blackbird JS yet, so: http://www.gscottolson.com/blackbirdjs/ http://www.gscottolson.com/blackbirdjs/ Filterable log messages, closable and

Nobody's mentioned Blackbird JS yet, so: http://www.gscottolson.com/blackbirdjs/ http://www.gscottolson.com/blackbirdjs/ Filterable log messages, closable and easy to stub out when you go into production.