Complex sentence: Daniel Glazman announced on September 15,2006 that he has stopped official development on Nvu and he is developing a successor to it, tentatively called Composer (or Mozilla Composer 2.0), as a Mozilla.org project.
Split into simpler sentences: Daniel Glazman announced on September 15,2006 that he has stopped official development on Nvu. Glazman is developing a successor to it, tentatively called Composer (or Mozilla Composer 2.0), as a Mozilla.org project.