Otto

Moderator and support forum member, and also does work on the WordPress.org website.

Dev Press

DevPress is a collaboration of four developers and designers that have come together to design elegant themes, carefully craft usable and functional plugins, and pen readable tutorials for WordPress.

Alex Shiels

Alex maintains Akismet, the famous spam-fighting plugin WordPress couldn’t do without. In his spare time he builds and runs one of the most useful online WordPress health check tools at Is My Blog Working?.

Andrew Nacin

Andrew is a WordPress core developer and member of the commit team. He developed the Log Deprecated Notices plugin which is very useful, and he is also a WordPress consultant.