Whatever happened to Unix's Writer's Workbench?

krishna swaroop asks: i would like to know whatever happened to writer's work bench (WWB). i remember reading some compsci books in 80's which mentioned something to the effect that `this book was typset, checked ... on unix'. i saw a mention of style checker, grammar checker and assorted such tools, the collection being named WWB. that was before MS-Word came along with its thesaurus and all. recently released GNU diction looks like an attempt to resurrect that. but does any one out there know where is WWB? is it free? can we persuade the current owners to make it free? Would someone care to shed some light on this subject?