persistence4j is a small and lightweight Java object persister that uses JDBC to persist data into a relational database. The library frees you from writing the Data transfer objects - just create a POJO and simply save it. Transactional and non-transactional connections are supported and can be configured from the simple properties file.
phpOpenTracker is a framework solution for the analysis of Web site traffic and visitor behaviour. It features a logging engine that, either invoked as a Web bug by an HTML image tag or embedded with two lines of code into your PHP application, logs each request to a Web site into a database. One installation can track an arbitrary number of Web sites. Through its API, you can easily access the gathered data and perform complex operations on it (for instance, the analysis of your visitors' click paths).
polliwog is a Java-based Web server log file analyzer. It creates a Web site of statistics and information about your Web site. It provides you with detailed knowledge of what your visitors did while visiting your site. It provides information on human visitors (including daily statistics), searches, search engines, site areas, pages, visit paths, linking sites, and more. It is highly configurable and user-extensible.
Processdsn consumes RFC 3464 delivery status notification email messages, writing a summary of the notification to a SQL database. Notifications may indicate successful delivery, a delay in delivery, or delivery failure. The database is designed to be exposed restfully by the mod_processdsn module for Apache httpd, but can queried directly if necessary.
protobuf-rpc-pro is a Java developer library that provides an RPC layer for Google's Protocol Buffer services. It builds upon Netty for low-level NIO. Features include bidirectional RPC calls from client to server and from server to client. The client and server are equal communicating peers. TCP connection re-use / keep-alive, SSL encryption support, RPC call cancellation, timeout and a pluggable logging facility logging RPC call data in Protocol Buffer format are included.