m0n0wall is an all-in-one firewall software package that is based on FreeBSD. It is geared towards embedded PCs, but it also works on standard PCs. It includes an easy-to-use Web interface like commercial firewall boxes do. PHP is used instead of shell scripts, and the entire system configuration is stored in a single XML-formatted file. There is support for VPN, traffic shaping, captive portal, VLANs, and more.
ipsvd is a set of Internet protocol service daemons for TCP/IP (optionally SSLv3) and UDP/IP. A daemon waits for incoming connections on a socket; for new connections, it conditionally runs an arbitrary program to handle the connection. The daemons can be told to read and follow pre-defined instructions on how to handle incoming connections; based on the client's IP address or hostname, they can run different programs, set a different environment, deny a connection, or set a per host concurrency limit. ipsvd can be used to run services usually run by inetd or tcpserver. Normally the daemons are run by a supervisor process, such as runsv from the runit package.
dbo is yet another database object framework written entirely in Python. Tables are represented using schema objects that encapsulate column information and supporting metadata. Row instances are represented as a dictionary. Features include database independence (with Postgres and MySQL support), automatic type conversion, database schema extraction, sequence emulation, on-the-fly table joins, and more.
The Bright Side Framework provides ready-to-use, high-level J2EE components which will help you quickly build business J2EE applications accessed by rich Java/Swing clients on HTTP. The components are loosely coupled, which allows you to pick only the one you need. The Remoting transparently encapsulates EJB calls inside HTTP. The List Of Values provides nice features for the reference data of all business applications. The Smart Value Object tracks the client modifications and manages the optimistic concurrency during client/server communication. The Remote Iterator allows a rich client to fetch the results of a SQL statement, block by block.
FMPP is a text file preprocessor that uses FreeMarker templates to provide macros, flow control, and expressions. It uses recursive directory processing, so it can generate complete homepages (a tree of HTML files and images). It is extendable in Java to display data from any data source (such as a database). It is usable with a command-line interface, as an Ant-task, or embedded into a Java application.