AbiWord is a fast, lightweight yet full-featured word processor. I'm one of its developers, and have touched most parts of the code in some way or another over the last few years. At the moment I'm the maintainer of the stable AbiWord 2.4 series.
libwpd is a library for importing WordPerfect(tm) documents. I'm one of its primary authors and responsible for large parts of its codebase. This library has been a huge success, as it is used by AbiWord, KWord, and OpenOffice.org.