internet-explorer-extensions
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Internet Explorer extensions
A list of extensions for the Microsoft Internet Explorer web browser (IE), which detect or extract microformats.
Oomph: A Microformats Toolkit includes an Internet Explorer Add-On that detects and processes microformats in web pages. The Add-On and associated tools are created by Microsoft and maintained as an open-source project (Ms-Pl) with community submissions.
Bookmarklets
For now see bookmarklets (AKA favelets).
Related
The Maxthon Browser also runs on Microsoft Windows, and has a plugin for detecting and acting upon microformats in web pages. See the Maxthon entry on the implementations page for more details.