CmdOption is a simple annotation-driven command line parser toolkit for Java 5 applications. Everything you need is (at least one) simple configuration object. Each field and method annotated with an CmdOption annotation will be processed. Based on this config, CmdOption is able to parse any command line, guaranteeing the declared specification. The result is directly stored in the given config object. When errors occur, CmdOption gives a meaningful error message. Generated output and validation/error message can be localized.
Variance provides a general-purpose, custom-wirable junction box for conversion between Java types. Values stored as Variants can be converted freely to any type (provided that a type converter exists between the original type and the target type), and users can add new type converters or override existing conversions.
PalindromicPrimeFinder is a little "toy" program that can find relatively big (e.g. 1000-2000 digits) palindromic probable prime (PRP) numbers. It generates random palindromic numbers and tests them for primality using a probabilistic algorithm. It is multi-threaded and stops after a certain timeout (if no palindromic primes are found).
FitNesse Launcher Maven Plugin can launch FitNesse as a wiki server or automatically run FitNesse tests as part of a standard integration-test/verify build. It allows configuration of FitNesse's classpath through plugin dependencies and injects all Maven project properties as FitNesse variables (which can be overridden from the commandline using "-D").
HTMLSplicer is a toolkit that provides methods to compose complex HTML documents from simpler HTML documents, called templates. It can be used to generate servlet responses in Java Web applications, without adopting a full-fledged presentation layer framework like JSP, JSF, Apache Wicket, or GWT.
Geomajas profiling project is a simple application profiling system that can be used to continuously gather profiling information in a running application. It allows you to get the number of invocations and total/average time. Profiling data can also be grouped to allow total time to be split up over different groups. There is utility code to use this for JDBC access profiling, and JMX integration for accessing the data which is gathered and reset the counters.