there are some but frankly they are not Windows equivalent:
Windows ones just let you push OCR button on your scanner, click few OKs in wizard and have scanned document as Word file (usually).
Linux ones are console apps (gocr f.e.) which are not too comfortable for office/home (most common use) but they are really nice for hacking - you know like bypassing captchas and so on...
so no. there is no normal, user friendly OCR application for Linux. sadly.