Free business software

open source software implementing a private branch exchange for various Voice over IP protocols

open-source content-management system

Tryton is a three-tier high-level general purpose computer application platform on top of which is built an enterprise resource planning (ERP) business solution through a set of Tryton modules. The three-tier architecture consists of the Tryton client, the Tryton server and the database management system (mainly PostgreSQL).

Pentaho is the brand name for several data management software products that make up the Pentaho+ Data Platform. These include Pentaho Data Integration, Pentaho Business Analytics,  Pentaho Data Catalog, and Pentaho Data Optimiser.

LogicalDOC is a proprietary cloud-based document management system that is designed to handle and share documents within an organization. LogicalDOC is a content repository, with Lucene indexing, Activiti workflow, and a set of automatic import procedures. The system was developed using Java technology.

JFire was an enterprise resource planning and customer relationship management system.

iDempiere. Community Powered Enterprise, also known as OSGi + ADempiere, is an open source enterprise resource planning (ERP) software that is fully navigable on PCs, tablets and smartphones, it also has customer relationship management (CRM) and supply chain management (SCM) functions.

Elastix is a unified communications server software that brings together IP PBX, email, IM, faxing and collaboration functionality. It has a Web interface and includes capabilities such as a call center software with predictive dialing.

OpenKM is a document management system that provides a web interface for managing nonspecific files. It has a Free/Libre Community Edition, and a proprietary Enterprise Edition. OpenKM includes a content repository, Lucene indexing, and jBPM workflow. The OpenKM system was developed using open technology (Java, Tomcat, Lucene, Hibernate, Spring).

trixbox (formerly Asterisk@Home) was a software PBX based on Asterisk.