February 1, 2010 — A brief introduction to the new After the Deadline add-on for Firefox, bringing the same contextual spell and grammar checking you’ve been using in WordPress to text fields everywhere. After the Deadline is brought to you by Automattic.
September 13, 2009 — HookPress allows you to set up webhooks so that a specified URL (a public service or something you set up) is requested when certain WordPress actions occur. Possible uses include generating push notifications or using non-PHP web technology to extend WordPress. This introduction by the plugin author, mitcho, gives you a brief overview of HookPress and a couple of examples for getting started.