Overview is a free, web-based tool for document mining. Developed by and for journalists, Overview is also broadly applicable to other corpus-based research applications. Aside from providing advanced search features such as regular expressions and fuzzy matching, Overview automatically sorts documents according to topic and provides a fast visualization and reading interface. You can apply tags to search results, individual documents, or entire topics to track what you've found, then export the entire document set with its tags to perform further processing or create visualization. It’s been used for qualitative research, social media conversation analysis, legal document review, digital humanities, and more. 

A tool to convert Normal/Scanned PDF and Image to Word, Excel, PPT, Keynote, Pages, Text, etc. on Mac.

Features:

Convert PDF to Word (.doc), Excel (.xlsx), and More Common Office Format Files

Convert PDF to Pages and Keynote

Convert PDF to Graphics Files

Convert Scanned PDF with Accurate OCR

Convert Multilingual PDF Files

Support Password-Restricted PDF Files

Extract Portions of Text, Image or Table for Reconstruction of Document

The DocScanner app uses a device's built-in camera to scan documents. Features include image optimization, OCR, document type recognition (document, business card, receipt, etc.), autosorting, and ability to upload documents to Evernote, Dropbox, and Google Drive.

Combined with the Leptonica Image Processing Library Tesseract can read a wide variety of image formats and convert them to text in over 40 languages.

This code is a raw OCR engine. It has no output formatting and no UI. It can detect fixed pitch vs proportional text. Nevertheless in 1995 this engine was in the top 3 in terms of character accuracy, and it compiles and runs on both Linux and Windows. Training code is included in the open source release.

The core developer on the project is Ray Smith (theraysmith).

Thomas Breuel (tmbdev) and Ilya Mezhirov (mezhirov) work on the OCRopus project, for which Tesseract is one of the pluggable OCR engines; OCRopus also provides layout analysis and statistical language modeling.

Most of the work on Tesseract is sponsored by Google.

A software tool capable of performing Optical Character Recognition (OCR) upon a set of images. It was one of the first OCR recognition software to be developed. It was developed in the late 1980s and sold by Caere Corporation. It is currently owned by Kofax Inc. It achieves the task by analysing pixel sets and in an image and cross-matching them to a dictionary of words. Omnipage automates large sections of the digitisation process enabling physical objects to be scanned, processed using the OCR software and exported to a document file format. Later versions of the software incorporate image enhancement features to improve scan quality (and recognition results) and better support for complex page layouts and forms.

Features:

Integration with scanning software

Maintain layout of captured document

A free (under the GNU General Public License) toolkit for the development of document image recognition systems.

Features:

Custom dictionaries may be created to assist with analysis of specific record types

Extensible functionality

Optical character recognition (OCR) toolkit plugin

SmartScore takes an image of a music score and converts it into an editable format, including MusicXML.

PhotoScore takes an image of a music score-- including handwritten scores-- and outputs it in an editable format, including MusicXML (the musical equivalent of a text OCR program).

An (optical character recognition) engine for creating editable and searchable electronic files from scanned paper documents, PDFs and digital photographs.

Features:

Recognition of Digital Camera and Mobile Phone Camera Images

Comprehensive Language Support

Complete Integration with Popular Office Applications

PDF conversion, archiving and security