PHP RSS Reader comes with a complete admin panel where every setting can be controlled.The application creates SEO-friendly URLs for every category & article which is important for anyone who will use PHP RSS Reader for creating a feed-based website rather than using it as a personal feed-reader.

Todoyu is an open source task/project management, time tracking & collaboration application that is built with PHP. The application has a modern, Ajaxed interface where both users & clients can have roles on projects.

 

The Ajax Availability Calendar is a php script designed to show availability of whatever you might need it for (eg. holiday cottage, hotel rooms etc.). 
Free to use on your website or application and is currently being used (v.2) by hundreds, if not thousands, of websites around the world.

 

 

Ortro is an open source framework designed to make easy activities for job scheduling and system/application monitoring.

 

 

Simple Invoices is a simple, community developed, free/open source, web-based invoicing system.

Teambox is a project management platform created for real-world, real-time collaboration. Teambox uses a Twitter-style means of communication to send messages, update project status, and manage assigned tasks.

MyClientBase is a simple, intuitive, free and open source web based invoice management system developed with freelancers in mind.

Jutda Helpdesk is a Django-powered ticket tracking system for small enterprise, designed from the ground up to be easy to use.

A2Billing combined with Asterisk now gives any Telecom company a very good reason to consider the A2Billing Soft-Switch over the traditional offerings for TDM and VoIP Soft-Switches as well as wholesale and IP PBX billing, particularly when you consider the cost of A2Billing – FREE!

Crafty Syntax Live Help is free and is progammed in PHP with Mysql for the datatabase. Other highlighted features include the ability to create your own questions, auto inviting visitors, referer tracking, page tracking, ability to view what the customer is typing as they type, multiple chat sessions, sound alert, leave a message if offline, push urls, quick responses, Customizable graphics, and multiple operators. runs on your server and is open source GPL.

It is a complete online solution focused on improving productivity, collaboration, communication and management of your teams.

Pandora FMS is a monitoring Open Source software. It watches your systems and applications, and allows you to know the status of any element of those systems.

Billwerx was designed as a lightweight CRM with integrated invoicing / billing functions. As time grows the basic function of Billwerx is to keep track of suppliers, clients, and invoices while providing a management with the tools like profit to cost summaries, campaign leads, employee...

Simple Customer was developed for anyone who needs a simple and easy way to keep track of their clients, customers and contacts. Developed with PHP/mysql, Simple Customer is light-weight, sleek and professional.

Achievo is a flexible web-based resource management tool for business environments.