PDF OCR is a simple drag-and-drop utility for Mac OS X that converts your PDFs into text documents. It uses advanced OCR (optical character recognition) technology to extract the text of the PDF even if that text is contained in an image. This is particularly useful for dealing with PDFs that were created via a Scan-to-PDF function in a scanner or photo copier. Supports English, French, German, Dutch, Spanish, Portuguese, Basque, Vietnamese, and Italian currently. The OCR engine is based on Tesseract.
Limited to PDFs of 1 page or less. Enterprise Version ($29.99), no limit on the size of the PDF.
(Via MacUpdate – Mac OS X.)