The future belongs to those that not only store their heavy load of documents in a conventionally digitized form, but also “maneuver” it with utmost efficiency: have instant access to it, track it, retrieve it, organize it. How? By leveraging the perfectly suited open source document management system!

Speaking of which, I'm sure you've already got your “feature wishlist” ready:
 

  • it should be easy to learn and to use 
  • it should provide you with version control
  • … with cloud access functionality
  • … with document workflow
  • … with document tagging
  • it should come be equipped with an intuitive, user-friendly interface
  • it should be free
     

But since it's open source document management software that I'll introduce you to in this post here, feel free to take this last “wish” off your list!

OK, so this is how the ideal, the one size-fits-all-contexts DMS looks like. But which one's the best for your own business?

The one that best meets your specific business needs'? Your organization's unique requirements?

For narrowing down your choices you should submit yourself to this quick questionnaire:
 

  1. What type of documents will you be storing though your future DMS?
  2. Where will you/your team need to access them? In a single office, across an entire infrastructure of offices scattered around the globe, on mobile devices?
  3. Is it a plug & play, a full-featured custom solution that you need or just the software to meet your needs? Which (your needs) are the “standard” ones, fitting into a particular market.
  4. What is your budget?
     

And while you're still pondering on some of your answers, let me narrow down your choices even more. To a list of 6 document management systems worth your attention:
 

1. Alfresco, On Top of The List of Any Organization Looking for The Right DMS

Geared, from the ground up, to meet the particular requirements of those enterprises having critical documents to store and manage.

What Open Source Document Management System to Choose- Alfresco

Therefore, the best answer to your What Is Alfresco? question would have to be:

"A robust enterprise open source document management system, fueled on open source, powerful enough to automate document-intensive processes within an organization"

And here are some of its most “tempting” features:
 

  • its complex user role system ensures effective collaboration across large teams/departments
  • robust content repository
  • freedom of customization: feel free to tailor custom workflows and content models to perfectly suit your specific needs
  • its collaboration web interface is geared at boosting team productivity
  • public source code: it leverages core open standards
  • access to a full set of add-ons and community-maintained extensions that you get to extend your DMS's functionality with
  • it seamlessly accommodates any productivity app \that you may want to integrate later on: Google Docs, Microsoft Office etc.
  • Alfresco mobile apps (for Android andiOS)
     

Should I also point out that NASA and the European Union, themselves, capitalize on Alfresco's:
 

  1. open standards
  2. unparalleled robustness in handling massive amounts of content
  3. convenient extensibility
  4. unmatched freedom of customization that it “spoils” its users with?
     

2. LogicalDOC Takes Open Source to a New Level

An open source document management system that comes in two flavors:
 

  1. Professional
  2. Community 
     

What Open Source Document Management System to Choose- LogicalDoc

A highly versatile one, that can be used in any web browser, perfectly “equipped” to:
 

  1. handle a significant load of documents
  2. boost the team's productivity while enhancing team collaboration, as well
     

Some of LogicalDoc's top features are:
 

  • quick & easy installation and intuitive use 
  • multilingual full-text indexing
  • task manager & events log
  • version control & document searching
  • local file system
  • reporting & statistics
  • task manager & events log
  • Web Services (SOAP & RESTful)
  • import from ZIP archives
     

And the list is literally an endless one! Do consider this feature-loaded, free open source document management software when looking for the right DMS to meet your requirements.
 

3. Seed DMS, A Powerful Open Source Document Management System

If for you “the best document management system means “the most powerful one”, then you might want to take the Seed DMS for a test drive.

What Open Source Document Management System to Choose- Seed DMS

It's mature enough, so it's already built a strong reputation around it, and it's enterprise-ready. Built to store and to share huge loads of documents.

And now, here are its other strong points worth your full attention:
 

  • real-time collaboration
  • version control 
  • users & groups management
  • HTML documents editing
  • built-in metadata support (author, description, keywords)
  • document review & approval workflow
  • full-text search
  • functionality for creating online presentations 
  • multi-level content directory, which supports +32000 documents 
     

Should I go on? For, the deeper I delve into the pile of Seed DMS features, the more I find. Or even better: how about you give this open source document management system a chance and see whether these features do meet your organization's particular needs.
 

4. Feng Office: More Than “Just” a DMS 

Why “more”? Because you get so much more than just the “standard” document management and team productivity-enhancing features. 

What Open Source Document Management System to Choose- Feng Office

And these additional, beyond the “conventional” functionalities are:
 

  • Task management
  • Time tracking
  • Workspace management
  • Knowledge management
     

Its set of features also include:
 

  • automatic alerts & reminders
  • notes
  • calendar
  • timesheet
  • wiki & forum support
  • reports & tags
  • workflow processes
  • task templates
     

5. OpenKM, A Conveniently Extensible DMS

And extensibility, coming from its OpenKM plug-in architecture, is not its only “superpower”.

What Open Source Document Management System to Choose- OpenKM

Versatility comes right after, since it practically supports:
 

  • all web browsers
  • all major DBMS databases
  • all common file types (OpenOffice, PDF, Office, XML, HTML, JPEG etc.)
     

Moreover, it empowers teams to set their own rules (logic) for automating the documentation process. For example, imagine that you'll need to set up a rule specifically for moving a particular document to a new destination.

You can do that with OpenKM!

And now, the (almost) full list of features that this open source document management system has been supercharged with:
 

  • workflow
  • OpenMeetings integration
  • document encryption/decryption functionality
  • automatic key extraction
  • antivirus integration
  • web services API
  • OCR integration
  • HTML editor
  • a functionality to create new documents leveraging pre-built templates and forms
  • Dropbox integration
  • mobile interface & Google apps synchronization
  • metadata navigator (along with categories, thesaurus, keyword...)
     

6. Kimios, The Best Alternative to the Heavy Document Management Software

If it's an alternative to the robust, heavy “document managing machines” that you're looking for, lightweight Kimios makes the perfect fit for your needs.

What Open Source Document Management System to Choose- Kimios

And it's not just its lightness that convinced us to add it to this list of document management systems, but its entirely service-oriented architecture, too (among others).

This means that it follows the client-server model: Web client, Kimios for Office, Kimios Explorer and all the other supported third-parties are connected to the main Kimios server.

To its central server, “in change” with exposing the web service layer covering Kimio's features.

Speaking of which (this DMS's features):
 

  • repository customization using metadata
  • customizable search engine
  • document-centered functionalities: create, delete, update
  • check-in-/out feature
  • version control 
  • user rights management
  • bookmarks documents (along with creating bookmarks and advanced requests functionalities)
     

And it goes on and on... and on.

Note: Kimios does integrate with Microsoft and Windows Desktop environment, but only under commercial license!

The END! These are the top 6 open source document management systems that you should consider selecting the right one for you from. And this no matter how your own list of feature needs& specific requirements might look like. 

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