Smoot is a tool, developed with xajax and Pear::DB for creating diagrams of icons and links between them.

Features include Google Maps and Google Earth integration, configurable tool palettes, and automated palette generation from a Google local query.

Smoot builds relations between objects with mouse clicks and the result can be stored easily. This nice tool can be a starting or an inspiration point for many projects like "online heritage services", "online diagram services" and much more.

Achievo is an open source web-based project management tool which also enables users to manage the business resources like human resources or customers with a CRM point of view.

Project management part of Achievo covers projects, phases, tasks, notes, statistics, planning, members and project templates.

The CRM section of Achievo allows you to administer your suppliers, prospects and customers and for each of these contact persons. It also includes a contract management part where contracts can be managed by relation. Projects are also managed by relation.

Achievo’s scheduler enables users to share a schedule with the other users. The scheduler includes dayview, weekview, monthview, recurring events and e-mail notices. Furthermore, it is possible to compare schedules.

Achievo is also an expandable project management software with ready to use extension modules and more than 20 languages supported.

Sending newsletters to 1000′s of users, tracking clicks, unsubscribe links, risk of sending e-mails twice? Yes, these are some concerns of newsletter management.

phplist, an open source PHP – MySQL based newsletter management application makes sending newsletters easy, professional and managable.

Some powerful features of phplist:

• No duplicate messages. No ‘forgotten’ messages.
• View and click tracking
• Templating and multiple subscribe pages
• Dynamic subscriber columns
• User specific content like "name, e-mail"
• Lists
• RSS subscription
• Scheduling
• CVS import and export
• Bounce detection and cleaning
• Auto PDF messages
• Attachments
• Throttling to prevent server overload

This open source newsletter manager can also be integrated with the current subscriber base with the built-in import feature or some coding for syncronazing databases.

TaskFreak! is an open source, ajax interfaced, web based task manager written in PHP.

It is similar to a project management software but concentrated more on tasks and does not have features like milestones, files or messaging. This makes TaskFreak! simpler but less complicated.

Some TaskFreak! features:

• Projects
• Tasks
• Deadlines
• Color based complete status & priority levels
• Ajax interface
• Users – task assignment

TaskFreak! says the application is GTD compliant (Getting Things Done – very nice post) and it offers 2 versions: single user & multi-user.

Secure input and data handling is hard when it comes to HTML because of many different types of malicious code (XSS).

HTML Purifier is a well documented, standards-compliant HTML filter library written in PHP. It simply:

• Removes all malicious code (better known as XSS) with an audited, secure yet permissive whitelist.
• Makes sure your documents are standards compliant. 

HTML Purifier requires PHP 5  (PHP 4 versions are not supported any more but can be downloaded). It saves so much time while developing & offers much more expertise than most of the self-coded data-handling libraries as HTML Purifier is concentrated only in this area.

This open source secure data handling solution also has a comparison chart wih other HTML filters.

Some community-written plugins for CMS softwares, WYSIWYG editors can be found in the HTML Purifier website.

Google already has an API for Google Maps service which makes it possible to create interactive, real-data-driven maps.

DrasticMap, an AJAX based component, makes it easier to show data from a MySQL database in Google Maps.

This Google Maps component is offered in a PHP – JavaScript package called DrasticTools which also includes 2 other components, DrasticCloud (for easy tag cloud generation) & DrasticGrid (grid editing).

DrasticMap uses MooTools JavaScript framework for the interaction, which is included in the download package.

AJAX Chat is a powerful, open source, fully customizable web chat software built with JavaScript, PHP and MySQL.

AJAX Chat supports voice chat that is powered by Flash & Ruby (sound support is optional).

This free AJAX chat software integrates easily with PHP community softwares like phpBB, MyBB, PunBB, SMF, vBulletin and sample integrations are provided with the software.

Some beautiful features include

• Multilanguage support
• Multiple channels
• Private messaging
• Private channels
• Invitation system
• Kick or ban offending users
• Online users list with user menu
• Emoticons / Smilies
• Flood control
• Possibility to delete messages inside the chat
• IRC style commands
• Possibility to define opening hours for the chat
• Possibility to enable/disable guest users
• Template system
• Standards compliance (XHTML 1.0 strict)
• Realtime monitoring and logs viewer
• Easy integration into existing authentication systems
• Well commented source code

Ajax Chat is developed with security in mind and it is strong against code injections, SQL injections, cross-site scripting (XSS), session stealing and other attacks.

ProjectPier is an open source, self-hosted PHP project management application which helps connecting teams, organizing projects & tasks through a web interface.

It’s code is based on activeCollab, which was a popular free project management application & became paid later on.

ProjectPier has an active community which discusses about the software, creates themes & translations.

Some features of ProjectPier:

• Multi-client capability lets you manage projects of different clients simultanously
• 3-Level rights management:
  1. Administrator
  2. User of owner company
  3. User of client company
• Possibility to limit rights of client users per project
• Messages and task lists can be linked to milestones
• Versioning can be used to manage revisions of uploaded files.
• Tags can be used to categorize messages, tasks, milestones, and files
• Fulltext search per project covering messages, tasks, milestones, and files
• Privacy: Messages, tasks, milestones, files, and comments can be flagged as ‘private’, hiding sensitive information from clients

Similar to TinyURL, a short URL service can be created in minutes with Shorty.

Shorty is a PHP script for creating shorter, human readable links from long URLs.

A reason to prefer using Shorty for personal use rather than TinyURL or similar services may be eliminating the risk of these services becoming offline and losing your links, as you can use this free short URL script forever.

Shorty has an admin interface where links can be organized and clicking statistics can be viewed. You can even have a RSS for your links.

ClickHeat is an open source heatmap statistics application & PHP class that visualizes your visitors clicking activities which is a very nice way of getting a snapshot of your visitor’s browsing behaviors.

Heatmaps can also be generated using its heatmap class inside other web applications.

ClickHeat is lightweight as very few function calls to log a click, no server load rise should be noticed. For tweakenings with the settings check the performance & optimization page.