Optimus is one of several microformats validator implementations and debugging-tools.
Optimus supports numerous microformats including hCard, hCalendar, hReview, hAtom (note: hAtom validation issues), ...
Get the Optimus microformats validator favelet. Blog post: validator browser button.
Please note issues and feedback on the optimus-issues page.
see also
- @optimusmf - Optimus twitter
- validators
- debugging-tools
- implementations
- favelets