Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that uses this library. It an convert documents in markdown, reStructuredText, textile, HTML, DocBook, or LaTeX to HTML formats, Word processor formats, PDF and other markup formats.
 
It can read
[markdown] and (subsets of) [Textile], [reStructuredText], [HTML],
[LaTeX], [MediaWiki markup], and [DocBook XML]; and it can write plain
text, [markdown], [reStructuredText], [XHTML], [HTML 5], [LaTeX]
(including [beamer] slide shows), [ConTeXt], [RTF], [DocBook XML],
[OpenDocument XML], [ODT], [Word docx], [GNU Texinfo], [MediaWiki
markup], [EPUB] (v2 or v3), [FictionBook2], [Textile], [groff man] pages, [Emacs
Org-Mode], [AsciiDoc], and [Slidy], [Slideous], [DZSlides], or [S5] HTML
slide shows. It can also produce [PDF] output on systems where LaTeX is
installed.

Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that uses this library. It an convert documents in markdown, reStructuredText, textile, HTML, DocBook, or LaTeX to HTML formats, Word processor formats, PDF and other markup formats.

Pandoc - General Markup Converter

Mailgun library to extract message quotations and signatures.For machine learning talon currently uses the scikit-learn library to build SVM classifiers. The core of machine learning algorithm lays in talon.signature.learning package. It defines a set of features to apply to a message (featurespace.py), how data sets are built (dataset.py), classifier’s interface (classifier.py). 
For machine learning talon currently uses the scikit-learn library to build SVM classifiers. The core of machine learning algorithm lays in talon.signature.learning package. It defines a set of features to apply to a message (featurespace.py), how data sets are built (dataset.py), classifier’s interface (classifier.py).

Mailgun library to extract message quotations and signatures.For machine learning talon currently uses the scikit-learn library to build SVM classifiers. The core of machine learning algorithm lays in talon.signature.learning package. It defines a set of features to apply to a message (featurespace.py), how data sets are built (dataset.py), classifier’s interface (classifier.py).

talon - Mailgun library to extract message quotations and signatures

The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF). All of these file types can be parsed through a single interface, making Tika useful for search engine indexing, content analysis, translation, and much more.

Apache Tika - A content analysis toolkit

borb is a pure python library to read, write and manipulate PDF documents. It represents a PDF document as a JSON-like datastructure of nested lists, dictionaries and primitives (numbers, string, booleans, etc). 



borb - Library for reading, creating and manipulating PDF files in Python



Java OCR is an Optical Character Recognition algorithm based on a mean squared recognizer. This tool also includes utilities to trace and extract characters. 

 References:
 <UL>
	<LI><A HREF="https://sourceforge.net/apps/trac/javaocr/" target="_blank">https://sourceforge.net/apps/trac/javaocr/</A></LI>
	<LI><A HREF="http://www.roncemer.com/software-development/java-ocr" target="_blank">http://www.roncemer.com/software-development/java-ocr</A></LI>
 </UL>

Java OCR is an Optical Character Recognition algorithm based on a mean squared recognizer. This tool also includes utilities to trace and extract characters.

JavaOCR

TCPDF is a PHP class for generating PDF documents without requiring external extensions. TCPDF Supports UTF-8, Unicode, RTL languages, XHTML, Javascript, digital signatures, barcodes and much more. Sourceforge location: <A HREF="http://sourceforge.net/projects/tcpdf/" target="_blank">http://sourceforge.net/projects/tcpdf/</A>

 <ul>
 <li>no external libraries are required for the basic functions</li><li>all standard page formats, custom page formats, custom margins and units of measure</li><li>UTF-8 Unicode and Right-To-Left languages</li><li>TrueTypeUnicode, OpenTypeUnicode, TrueType, OpenType, Type1 and CID-0 fonts</li><li>methods to publish some XHTML code, Javascript and Forms</li><li>images, graphic (geometric figures) and transformation methods</li><li>1D and 2D barcodes including QR-Code ad PDF417</li><li>Grayscale, RGB, CMYK, Spot Colors and Transparencies</li><li>automatic page header and footer management</li><li>document encryption and digital signature certifications</li><li>transactions to UNDO commands</li><li>PDF annotations, including links, text and file attachments</li><li>text rendering modes (fill, stroke and clipping)</li><li>multiple columns mode</li><li>bookmarks and table of content</li><li>text hyphenation</li><li>automatic page break, line break and text alignments including justification</li><li>automatic page numbering and page groups</li><li>move and delete pages</li><li>page compression</li><li>font subsetting</li>
</ul>

TCPDF is a PHP class for generating PDF documents without requiring external extensions. TCPDF Supports UTF-8, Unicode, RTL languages, XHTML, Javascript, digital signatures, barcodes and much more.

TCPDF - PHP class for generating PDF

UIMA analyzes large volumes of unstructured information in order to discover knowledge that is relevant to an end user. It is a framework with different set of components. The components include Language Identification, Language specific segmentation, Sentence boundary detection, Entity detection (person/place names) etc. The framework manages these components and the data flows between them. It could detects entities like email addresses, URLs, phone numbers, zip codes or any other entity based on regular expressions.
 <img src="/AppImages/Article/uima-img1.jpg" alt="" class="float-center">

UIMA analyzes large volumes of unstructured information in order to discover knowledge that is relevant to an end user. It is a framework with different set of components. The components include Language Identification, Language specific segmentation, Sentence boundary detection, Entity detection (person/place names) etc. The framework manages these components and the data flows between them.

UIMA - Unstructured information management architecture

Tesseract is a C++ open source OCR engine. Tessnet2 is .NET assembly that expose very simple methods to do OCR.
Tessnet2 is multi threaded. It uses the engine the same way Tesseract.exe does. Tessdll uses another method (no thresholding).

A .NET 2.0 Open Source OCR assembly using Tesseract engine.

Tessnet2

A library for PDF manipulation implementing Adobe PDF standard version 1.7. This library allows to read PDF files and apply changes to them, it is written in .NET 2.0 using Visual Studio 2005. Writing and Parsing PDF is supported. You can also modify existing PDF files by changing their document information properties, add text annotations to a page, add JPEG images to a page, change page rotation and erase the whole content of a page.

A library for PDF manipulation implementing Adobe PDF standard version 1.7. This library allows to read PDF files and apply changes to them, it is written in .NET 2.0 using Visual Studio 2005. Writing and Parsing PDF is supported.

PDF Library - PDF manipulation in .NET

jPod is a PDF manipulating and rendering framework. It provides functionality to read, verify the document against the PDF specification. It also provides content stream and rendering framework. It could able to create new document and do incremental updates. 

 <A HREF="http://opensource.intarsys.de/home/en/index.php?n=JPodRenderer.HomePage" target="_blank">jPod Renderer</A>, a complete rendering implementation for AWT and SWT with lot of support for platform specific tasks. It has pluggable image conversion and font handling support.

jPod is a PDF manipulating and rendering framework. It provides functionality to read, verify the document against the PDF specification. It also provides content stream and rendering framework. It could able to create new document and do incremental updates.

jPod - PDF manipulating and rendering framework

JODConverter automates conversions between office document formats using OpenOffice.org or LibreOffice. Supported formats include OpenDocument, PDF, RTF, HTML, Word, Excel, PowerPoint, and Flash. It can be used as a Java library, a command line tool, or a web application. 


JODConverter - Automates document conversions using OpenOffice

PDFjet is a high performance PDF library for Java and .NET. It has support of drawing points, lines, box, polygons etc. It supports unicode text, embedding images, embedding hyperlinks and lot more. Its simple to use table class helps to generate flexible reports. 

 It is compatible with the Google App Engine. Its open source edition has very less feature whereas Commercial edition has lot more.

PDFjet is a high performance PDF library for Java and .NET. It has support of drawing points, lines, box, polygons etc. It supports unicode text, embedding images, embedding hyperlinks and lot more. Its simple to use table class helps to generate flexible reports.

PDFJet - PDF library for Java and .NET

documents4j is a Java library for converting documents into another document format. This is achieved by delegating the conversion to any native application which understands the conversion of the given file into the desired target format.
 
documents4j comes with adaptations for MS Word and MS Excel for Windows what allows for example for the conversion of a docx file into a pdf file without the usual distortions in the resulting document which are often observed for conversions that were conducted using non-Microsoft products.

documents4j is a Java library for converting documents into another document format. This is achieved by delegating the conversion to any native application which understands the conversion of the given file into the desired target format.

documents4j - Java library for converting documents into another document format

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