Best OCR software for Linux

Hello.

First of all I want to apologize for my bad English.

I need software like Kofax Capture, ABBYY Flexicapture or Anydoc Captureit but it must run on Linux.

The main features of this software are:

• a good OCR and a good ICR
• reads barcode and QR code
• cleans documents
• classification of documents according to content (through rules)

Anyone knows any software, please?

I've seen some threads about OCR but I want more than OCR (I want a data capture software). I am leaning to this one but not for sure. I don't want to use a online version as some suggest.

Thanks