KOffice consists of several applications that offer a specialized interface for a certain task to a generic set of content components. Its office suite includes word processing, spreadsheets, presentations, graphics, databases, project planning. 

 KWord is an intuitive word processor application with desktop publishing features. 
 KSpread is a fully-featured spreadsheet application. Use it to quickly create spreadsheets with formulas and charts, to calculate and organize your data. 
 KPresenter is a powerful and easy to use presentation application. You can dazzle your audience with stunning slides containing images, videos, animation and more. 
 Kexi for integrated data management. 
 KPlato for project planning. 
 Kivio for diagram­ming and flowcharting. 
 Karbon for drawing vector graphics. 
 Krita for painting and image editing.

KOffice consists of several applications that offer a specialized interface for a certain task to a generic set of content components. Its office suite includes word processing, spreadsheets, presentations, graphics, databases, project planning.

KOffice - office suite for KDE

Calligra-suite is a continuation of KOffice. The new name reflects the wider value of the KOffice technology platform beyond just desktop office applications. Currently all applications except Calligra Words will be maintained by their respective KOffice developers. 
 The Calligra Suite contains the following applications: 
 Words Word processor application evolved from KWord of KOffice 
 Tables Spreadsheet program, previously known as KSpread 
 Stage Presentation program, previously known as KPresenter 
 Flow Flowchart program, previously known as Kivio 
 Kexi Database application like Microsoft Access 
 Plan Project management application, previously known as KPlato 
 Krita Drawing application for multi-layered pixel-based images 
 Karbon Drawing application for multi-layered vector images

Calligra-suite is a continuation of KOffice. The new name reflects the wider value of the KOffice technology platform beyond just desktop office applications. Currently all applications except Calligra Words will be maintained by their respective KOffice developers.

Calligra-suite - a continuation of KOffice 

OpenOffice is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. Java is mainly required for the HSQLDB database engine (used by our database product Base) and to make use of accessibility and assistive technologies.

OpenOffice is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages.

OpenOffice - leading open-source office software suite

Gnome Office consist of bunch of application such as Word, Speadsheet, Presentation, Graphics and Database. 

 AbiWord - Word processor (supports also OpenDocument Format). 
 Evince - Document viewer (official part of GNOME). 
 Evolution - Groupware and Email application (official part of GNOME). 
 Gnumeric - Spreadsheet application. 
 Inkscape - Vector Graphics and Presentation Creations 
 Ease - Presentations (using Clutter, in development) 
 GnuCash - financial application 
 gLabels - label designer 
 Glom - database designer similar to Filemaker 
 Dia - diagram creation

Gnome Office consist of bunch of application such as Word, Speadsheet, Presentation, Graphics and Database. 

Gnome Office -  office suite for GNOME 

LogicalDOC is a modern document management system with a nice interface, easy to use and very fast. It uses open source Java frameworks such as Spring, Hibernate and Lucene in order to provide a flexible and scalable DMS solution. Thanks to the most advanced presentation technology, LogicalDOC offers an unrivaled user experience with a refined and responsive interface.
 
A rich set of APIs is available for integration with third-party applications via webservice. On the website of LogicalDOC you can also download the commercial version of the software with a set of additional features.
 
<img src="/AppImages/Article/logicaldoc-screenshot_sm.png" alt="" class="float-left">

LogicalDOC is a modern document management system with a nice interface, easy to use and very fast. It uses open source Java frameworks such as Spring, Hibernate and Lucene in order to provide a flexible and scalable DMS solution. Thanks to the most advanced presentation technology, LogicalDOC offers an unrivaled user experience with a refined and responsive interface.

LogicalDOC Document Management - DMS

LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux. LibreOffice is the perfect choice for home users, businesses, government and other organizations. It's native file format is the ISO standardized ODF (Open Document Format), but LibreOffice can open and save Microsoft Word, PowerPoint and Excel files, as well as many other formats, bringing you the widest-available compatibility with other products. It has 6 feature-rich applications for all your document production and data processing needs:
 
 <a title="Word processor" href="http://www.libreoffice.org/features/writer/">WRITER</a> is the word processor inside LibreOffice.Auto-completion, Auto-formatting and Automatic spelling checking makes your tasks easy. Writer is powerful enough to tackle desktop publishing tasks such as creating multi-column newsletters and brochures.
 
 <a title="Spreadsheet" href="http://www.libreoffice.org/features/calc/">CALC</a>is the spreadsheet inside LibreOffice. Analyze your data with Calc and then use it to present your final output. Charts and analysis tools help bring transparency to your conclusions. A fully-integrated help system makes easier work of entering complex formulas. Add data from external databases such as SQL or Oracle, then sort and filter them to produce statistical analyses. Use the graphing functions to display large number of 2D and 3D graphics from 13 categories, including line, area, bar, pie, X-Y, and net – with the dozens of variations available, you're sure to find one that suits your project.

<a title="Presentation" href="http://www.libreoffice.org/features/impress/">IMPRESS</a> is the fastest and easiest way to create effective multimedia presentations. It is similar to MS Powerpoint. Stunning animation and sensational special effects help you convince your audience. Create presentations that look even more professional than the standard presentations you commonly see at work.

<a title="Graphics editor" href="http://www.libreoffice.org/features/draw/">DRAW</a> lets you build diagrams and sketches from scratch. A picture is worth a thousand words, so why not try something simple with box and line diagrams? Or else go further and easily build dynamic 3D illustrations and special effects. It's as simple or as powerful as you want it to be.

<a title="Database engine" href="http://www.libreoffice.org/features/base/">BASE</a> is the database front-end of the LibreOffice suite. With Base, you can seamlessly integrate into your existing database structures. Based on imported and linked tables and queries from MySQL, PostgreSQL or Microsoft Access and many other data sources, you can build powerful databases containing forms, reports, views and queries. Full integration is possible with the in-built HSQL database.

<a title="Equation editor" href="http://www.libreoffice.org/features/math/">MATH</a> is a simple equation editor that lets you lay-out and display your mathematical, chemical, electrical or scientific equations quickly in standard written notation. Even the most-complex calculations can be understandable when displayed correctly. E=mc2.

LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux. LibreOffice is the perfect choice for home users, businesses, government and other organizations. It's native file format is the ISO standardized ODF (Open Document Format), but LibreOffice can open and save Microsoft Word, PowerPoint and Excel files, as well as many other formats, bringing you the widest-available compatibility with other products.

LibreOffice - The Document foundation

Nuxeo DM manages and tracks the flow of content through the business cycle, addressing the common pitfalls of document duplication, lack of version tracking, time-consuming search and retrieval, and security and access issues. It captures content with different formats like scanned images, email, office documents, CAD files etc. Audit logging and configurable versioning policies helps to to track the content lifecycle. 
 Community site: <A HREF="http://community.nuxeo.com/" target="_blank">http://community.nuxeo.com/</A>

Nuxeo DM manages and tracks the flow of content through the business cycle, addressing the common pitfalls of document duplication, lack of version tracking, time-consuming search and retrieval, and security and access issues. It captures content with different formats like scanned images, email, office documents, CAD files etc. Audit logging and configurable versioning policies helps to  to track the content lifecycle.

Nuxeo Document Management

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

NeoOffice is a full-featured set of office applications including word processing, spreadsheet, presentation and graphics programs for Mac OS X. It is created by forking OpenOffice and added Mac specific features to it. NeoOffice Mobile application is available for Android devices, iPhone, iPad, and iPod touch.

NeoOffice - Office for Mac

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

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