VueScan is good. I gave up on the Fujitsu software which was a constant frustration. If only their software was as good as their hardware scanners. At the moment very happy with ExactScan Pro, which works flawlessly with the ScanSnap iX500. Much more lightweight app than ScanSnap Home and all the bells and whistles on board incl. OCR.
Many other solutions for OCR available. I use Devonthink 3, but also PDFPen Pro with Hazel, and sometimes Prizmo.