Previously available as a Beta, DEVONthink Professional is a more robust version of its sibling, DEVONthink Personal, that offers support for multiple databases, full AppleScript support, the ability to export data to an iPod or as a Web site, online archiving capabilities and more.
DEVONthink Professional requires Mac OS X v10.3.9, although some features, such as the included Dashboard Widgets, only work in v10.4. Pricing is US$75, or $99 bundled with the research assistant DEVONagent. A demo version works for 150 non-continuous hours before it must be licensed.