epers stands for "Erlang persistence". As the name suggests, it tries to make it easy to use databases in Erlang programs, to make the language a little more agile, and (humbly) offer a nice adapter for several databases, hiding their implementation details (and the API of the library/framework/driver used to communicate with them). To achieve this, it aims to offer a somewhat consistent API to define and work with your model, while at the same not coupling your code too tightly to it.
REPOS stands for Repository of Erlang-Projects.Org Software selection. It is a collection of major ready-to-use Erlang software. Erlang REPOS is distributed as a CDROM image (ISO). You can use every program included in the REPOS environment either directly from the CDROM, from your hard drive, or from a USB key.
Esdl is library for accessing SDL and OpenGL through Erlang. SDL handles 2d graphics, user events, and audio while OpenGL handles 3d graphics. SDL (Simple DirectMedia Layer) is a cross-platform multimedia library designed to provide fast access to the graphics framebuffer and audio device. It also does event handling from mouse, keyboards, and joysticks. OpenGL is a cross-platform standard for 3D rendering and 3D hardware acceleration.
The Bluetail Ticket Tracker (BTT) is a system for creating, storing, and keeping track of tickets. A ticket describes an issue of some sort. It can, for example, be a Trouble Report or a ToDo note. BTT also makes it possible to store customer information, which can be coupled to a ticket. BTT comes with a wiki-style knowledge base and an automatic mail store.
ERDaddresses is a simple little address book program using text files. In addition to text data, contact photos can be viewed. Additional applets can be downloaded. The GUI interface used is ERDialog, which is written in Erlang and interfaces through a Web browser. It is cross-platform where ever Erlang and Yaws run. This is a full release ERDialog framework so applets can be added.
J-EAI is an XMPP-based Enterprise Application Integration (EAI) platform (also known as ESB, the Enterprise Service Bus). It is composed of several components, including an Erlang XMPP server core, connectors that support Open Adaptor and XSLT, and several distribution mechanisms, including publish and subscribe and content-based routing.