JRequisite is an agile requirement management tool, which means your requirements are defined mainly via visual tools as opposed to textual requirement tools. Also, it is independent of the process used, so you may apply any process to your development. Despite being a requirement analysis and management tool, JRequisite tools are so general that they can be used in other areas of software development and even non-software related fields.
high-resolution-timer is a library with Java and C++ wrappers to implement high resolution timers. These timers can be used, for example, to count the ticks when doing performance analysis. This library exploits the system dependent timers/clocks and provides a timer-like interface to the same. The attached file has build scripts for Linux and Solaris. There is also a Java wrapper over the library, which uses JNI to use the timer interfaces.