AIDS (AJAX Image Dump System) is a simple, yet powerful AJAX-based image host system. It's geared toward forum usage, and it generates bb-code for cutting and pasting into forums that support bb-code. It lets people create user accounts to keep track of their pictures, reaccess them later to view stats, delete them, or simply copy the bb-code again.
APIlity Agua is an AJAX application that allows users to manage their Google AdWords accounts in an interactive and asynchronous way. The application behaves almost like a program on your desktop, but runs entirely in your Web browser. The name Agua stands for APIlity GUI for AdWords.
The ATK Framework is a PHP business framework. It is targeted at developers who wish to focus on business logic instead of coding HTML. ATK provides a complete framework that requires only small amounts of code to get usable applications, while maintaining full flexibility. ATK has a model driven approach, but is 100% customizable.
Abacia Event is an event registration and management system that allows you to set up online and offline registration for events (seminars, conferences, expos, training, etc.). The system is very comprehensive. It allows you to register multiple ticket types, meals and other optional purchases, classes that happen concurrently, discounts, tiered pricing, and multiple registrations. Exhibitor, sponsor, and speaker registrations are supported. The exhibitor registration also has a floor plan drawing tool and a way to show the floor plans to the potential exhibitors so they can select their booth(s) and pay for them as well as create a Web page for them and allow attendees to see see the floor plan and schedule appointments with the exhibitor. There are also many other tools and features.
AdaptCMS is a PHP content management system powered by cakePHP that features a powerful plugin/theme system, complete article management with custom fields/template system and many other features, along with a fully responsive design. All these tools make it easy to create the content website you want to without the hassle. It uses Bootstrap to ensure a pleasant experience whether you are on a desktop or a mobile phone. Asset management allows easy editing inside the CMS to adjust the styling if you wish. Custom fields have many more options, from simple text inputs to dropdowns with adjustable dropdown options. Full category management is included, as well as being able to link articles to one another no matter what category they are in.