mod-vhost-ldap is an Apache 2.x module for storing and configuring virtual hosts from LDAP. It supports DocumentRoot, ScriptAlias, ServerName, ServerAlias, ServerAdmin, and SuexecUserGroup directives. It's built on top of mod_ldap, so it uses its caching capabilities and can be used with a threaded Apache httpd.
TomP2P is a P2P-based high performance key-value pair storage library. Each peer has a table (either disk-based or memory-based) to store its values. A single value can be queried or updated with a secondary key. The underlying communication framework uses Java NIO to handle many concurrent connections.
AtMail is a webmail client. The project aims to provide an elegant client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface. Features include complete Webmail functionality, address-book support, video mail, an AJAX interface, drag'n'drop, and more.
Weed-FS is a simple and highly scalable distributed file system. There are two objectives: to store billions of files, and to serve the files fast! Instead of supporting full POSIX file system semantics, it implements only a key-file mapping. Instead of managing all file metadata in a central master, it manages file volumes in the central master and lets volume servers manage files and the metadata. This relieves concurrency pressure from the central master and spreads file metadata into volume servers' memories, allowing faster file access with just one disk read operation. It is modelled on Facebook's Haystack design paper. Only 40 bytes of disk storage are required for each file's metadata, and disk reads are O(1).
NagiosAppender is a pure Java implementation of a Log4j appender that allows the developer/administrator to send log records to Nagios via the NCSA server (using the push model). It provides a simple solution for Nagios administrators whose only alternative is to implement a polling function against against the output of a standard Log4j appender. The log4j configuration file provides for user-specific mappings between Log4j levels and Nagios levels. The configuration file also allows the user to select whether to set the Nagios 'service' and 'host' programmatically via Log4j MDC, or via the config file. Later releases support XOR encryption.
Log4php is a PHP port of Log4j, the most popular Java logging framework. It supports configuration through XML and properties files (with the same structure as log4j) and custom Configurators. File, RollingFile, DailyFile, Echo, Console, Mail, PEAR::Db, PHP error, Syslog or NT events, and socket appenders are supported. Simple, TTCC, Pattern, Html, and Xml Layouts are supported. It also supports Filters, custom Levels, and Loggers. Internal debugging can be switched on and off. Log4php can be used inside a class or inside a main/sub function.