Mortíforo is a portable, enterprise-ready forums discussion software with a modular authentication system, including LDAP centralized authentication support. PostgreSQL and Oracle are supported, using SqlMaps to separate the database logic. Freemarker is used to separate the presentation logic from the backend. It is available in English, Spanish, French and Dutch. It is developed under the Java Servlets 2.4 specification.
PukiWiki ('PoohKeyWeKey' without any prolonged sounds) is a wiki implementation that works on PHP 4 and 5, outputs XHTML 1.1, has many plugins (including one for bug tracking) and skins (such as one for embedded browsers), enables English and/or UTF-8 configuration, and features case-insensitive WikiNames. The formatting rules are based on YukiWiki.
Seir Anphin is a CMS focused on developing communities. Its core is a versatile platform for building any kind of site, but there is also a set of modules which provide features for building social networking hubs and communities. These modules integrate themselves during installation automatically, so you can just choose the features you need: forums, blogs, events calendar, file sharing, image gallery, and advanced article publishing.
Ansilove/PHP is a set of tools that convert ANSi and artscene-related file formats into PNG images, supporting ANSi (.ANS), PCBOARD (.PCB), BiNARY (.BIN), ADF (.ADF), iDF (.IDF), TUNDRA (.TND), and XBiN (.XB) formats. It includes a command line converter and a library for doing "on the fly" conversions. It creates optimized 4-bit PNG files and supports SAUCE, 80x25, 80x50, Amiga fonts, and iCE colors. It supports 14 MS-DOS charsets (IBM PC, Baltic, Cyrillic, French Canadian, Greek (CP737 and 869), Hebrew, Icelandic, Latin-1, Latin-2, Nordic, Portuguese, Russian, Turkish) as well as unofficial charsets (Armenian, Persian).
Fruit Show is a minimalist forum package based on the forums at joelonsoftware.com. It is based on the philosophy that social atmosphere is a by-product of software design. There's no registration and very few features for visitors. It's skinnable and easy to install. It also contains some unique moderation features. Fruit Show is intended for small sites that need an easy to use and accessible forum.