qdPM is an open source project management application that is created for small teams in mind.

It is built with PHP/MySQL & relies on Symfony Framework (bundled with the download package).

It has support for adding extra fields for projects, tasks & users which eases customizing the application.

With the multiple task editing feature, it is possible to work with multiple tasks faster.

Projects in qdPM can be set to different billing types like per hour, fixed price, etc. & a powerful reports module helps analyzing these data like any other data in the system.

The application is multilangual & already comes with various language files.

PeoplePods is an open source toolkit built with PHP/MySQL for creating websites with social networking capabilities with ease.

It can be used to build stand-alone sites or layered onto existing sites for adding social functionality.

It has the popular social functionality such as:

• friend lists
• personalized content views
• bookmarking
• voting, etc.

and standard web application features like:

• log-in
• personalization
• content creation and management
• & more

The toolkit is object-oriented & comes in 3 pieces: the core, plugin modules & administrative tools.

PeoplePods has support for theming & can be improved further easily with its plugins module.

HESK is a free help desk (also known as support ticket) system that is built with PHP/MySQL.

Using the application, anyone can submit tickets from a web-based interface & follow their status easily. Also, the admins will be able to sort any requests by priority & answer them without leaving any non-replied requests.

The admin-side has support for canned responses for faster replies, tickets can be auto-closed after x days & more.

There is also a full-featured knowledgebase, that supports unlimited categories, where users can find answers to their questions themselves.

P.S. HESK has a free & paid version where the only limitiation of the free version is a backlink.

conjoon is a web-based open source application, built with the Zend Framework, that focuses on message exchanging.

Currently, it is a full-featured webmail & RSS reader client with contacts management. But the upcoming releases show that it will also have an integrated Twitter client with multiple accounts support.

Thanks to Ext JS, the application has a slick desktop-like interface with tabs, drag'n drops & more.

It comes with a web-based installer & requires PHP/MySQL to run.

Retrospectiva is an open source project management & bug-tracking application that is focused on development teams.

It is built with Ruby on Rails & requires a MySQL database for storing the data.

It has 3 main modules:

• ticketing: to manage issues/requests
• code review / revision management: supports Subversion & Git)
• milestones / goals: to set & manage objectives for the project

And, comes with various add-ons like:

• wiki: manage documentation
• blog: to interact with the community, make announcements.
• agilePM: comprehensive support for your agile development process
• & more, which can be found in the wiki's installation pages.

Retrospectiva has an easy-to-use admin interface, a XML-REST-based API for integration with 3rd party applications & RSS support for following every content much simpler.

Every web application that works member-based needs a functionality where visitors can register & manage their profiles.

UserCake is a free user management system, built with PHP/MySQL, which aims to be a foundation to ease creating the application.

UserCake is object-oriented, cleanly written, well commented, formatted & documented.

It offers the following functions:

• Login
• Register
• Lost password
• Update password
• Update user details
• Email templates (optional)
• Account activation (optional)
• User groups (Basic, id – group_name)

The system comes with frequently used member-page functions like isUserLoggedIn() or isGroupMember($id) which will help developing faster.

And, in means of security, UserCake uses salt along with a SHA1 hash.

Microblogging, with the wide usage of Twitter, is a hot subject in today’s web.

Using few words & spending less effort compared to the standard blogging, it becomes possible to share knowledge, feelings, etc. And, it keeps users connected to other users with the simple yet powerful community features.

While there are very popular microblogging services like Twitter, Tumblr or Plurk, being a rival may not be (or may be) the best idea. However, in order to create something unique, a community for a closed group or a microblog for a single user, there are still huge opportunities.

Here are 9 open source microblogging applications to create your own:

StatusNet (PHP)

StatusNet (previously Laconica) is the engine which runs the popular microblogging site Identi.ca.

It is built with PHP/MySQL & offers a smooth usage as it is a widely used, mature application.

P.S. The source can be found here.

Yonkly (Asp.Net)

Yonkly is an Asp.Net-powered Twitter-clone for creating your own microblogging community network.

Besides the open source version, it has a hosted & an advanced standalone version.

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MODx is a powerful open source CMS that is built with PHP & uses MySQL for storing the data.

It focuses on offering zero restrictions while creating a website & has a flexible template engine + a robust API for creating anything customized.

The application has a crowded community which already created lots of plugins to extend its functionality.

It comes with TinyMCE integrated, which is a great HTML editor, but new ones can be installed with ease.

MODx is also a SEO-friendly CMS with the URLs & meta content it creates.

P.S. The application is not a fresh resource, it is around for more than last 2 years. However, it became more mature & stable with the release of the GA version 1.0. So, you may want to take a look at it again.

Piwik is an open source website analytics application which provides detailed statistics about visitors, keywords, pages & more in real-time.

It can be installed on an any PHP-MySQL compatible webserver & the rest works similar to Google Analytics; inserting the tracking codes into the websites we want to track.

One installation of Piwik can track unlimited number of websites which is great for web design companies who would prefer to offer a branded/customized solution to their customers.

Also, the user interface is fully customizable: you can drag and drop the widgets you want to display and create a report especially tailored to you.

The application is built around plugins which means it is possible to add/remove features easily.

Its open API makes integrations with 3rd party software possible. And, here are 2 desktop applications that use this API to bring Piwik to your desktop:

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Tutorialzine is sharing a beautiful tutorial (with source) on creating an Ajaxed drag’n drop shopping cart with jQuery & PHP.

It uses MySQL for storing the data & simpleTip plugin for displaying information about the products with style.

It takes advantage of the jQuery UI’s draggable & droppable behaviours to accomplish the flawless experience.

The shopping cart is not a ready-to-go one for an e-commerce website but it is a nice base for creating one by improving the features.

Tip: Tutorialzine provides other nice tutorials which you may be interested in like:

• A Stylish Navigation Menu With jQuery
• Creating a Facebook-like Registration Form with jQuery