ejabberd is a multi-platform, scalable, distributed, and fault-tolerant Jabber/XMPP server. It includes Jabber services like Multi-User Chat, IRC transport, HTTP-Bind, Publish-Subscribe and PEP. It supports virtual hosting, connection to transports (gateways) to other networks, and connection to other Jabber servers. Other supported features are Web and command-line administration, encryption support (SSL and TLS), several authentication methods (embedded, external script, LDAP, PAM, and ODBC), varied storage methods (embedded, ODBC, PostgreSQL, MySQL, MSSQL), Jabber user directory, and translations in more than 20 languages.
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.
Ybot is erlang bot software inspired by Github hubot. It supports IRC and XMPP transports and is extensible with plugins. Plugins can be written with Python, Ruby, or shell. It supports IRC chat, XMPP multi user chat, and 37 signals Campfire chat. It can simultaneously run any number of bots on different transports.
ERDtext is a simple text file viewer that is part of ERDialog. ERDialog is an application framework using Yaws. Multiple applets can be loaded into the framework. The existing applets include a file launcher, MPD audio interface, and wiki. It only requires Erlang and Yaws to be installed.
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.
Yaws is a WWW technology with capabilities similar to the combination of Apache with PHP and a database. Yaws runs faster, with smaller footprint, higher scalability, and higher reliability. Subjectively speaking, it uses a more beautiful technique to generate dynamic pages than other similar technologies.