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What is Iperf? While tools to measure network performance, such as ttcp, exist, most are very old and have confusing options. Iperf was developed as a modern alternative for measuring TCP and UDP bandwidth performance. Iperf is a tool to measure maximum TCP bandwidth, allowing the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

LibMicro is a portable set of microbenchmarks that many Solaris engineers used during Solaris 10 development to measure the performance of various system and library calls. LibMicro was developed by Bart Smaalders and Phil Harman as part of their If another OS is faster it's a Solaris bug performance campaign.

SciMark 2.0 is a Java benchmark for scientific and numerical computing. It measures several computational kernels and reports a composite score in approximate Mflops (Millions of floating point operations per second). Results of this benchmark can be sent to pozo@nist.gov and are listed at <http://math.nist.gov/cgi-bin/ScimarkSummary>;.

Siege is an http regression testing and benchmarking utility. It was designed to let web developers measure the performance of their code under duress, to see how it will stand up to load on the internet. It lets the user hit a web server with a configurable number of concurrent simulated users.

BasicDSP is an educational tool that makes it easy to experiment with simple Digital Signal Processing algorithms for audio signals. The input can either be taken from the sound card, or be a locally generated sine wave, white noise or impulse signal. The output is fed to the sound card, as well as to a virtual oscilloscope and spectrum analyzer.

FidoCadJ is an easy to use graphical editor, with a library of electrical symbols and footprints (traditional and SMD). It aims to be an agile and effective small EDA tool for hobbyists. FidoCadJ stores its drawings in a compact text format, practical for the copy and paste in newsgroups and forums: this has determined its success on the Usenet and in numerous communities.

MeshDev is a mesh comparison software. It accepts two meshes as input and computes the geometrical deviation between the two meshes. It return numerical values and can optionaly generate visual results (with a pseudo-colored mesh corresponding to the measured deviation) in OpenInventor format.

PyCAM is a toolpath generator for 3-axis CNC machining. It loads 3D models in STL format or 2D contour models from DXF or SVG files. The resulting GCode can be used with EMC2 or any other machine controller. PyCAM supports a wide range of toolpath strategies for 3D models and 2D contour models.

SCEPTRE (System for Circuit Evaluation and Prediction of Transient Radiation Effects) is a general purpose circuit analysis program which provides all three major analyses, AC, DC, and transient analysis, on either linear or nonlinear networks. It employs a free-form input language and state variable methods to simulate problems of interest to electrical engineers.

A set of utilities to communicate with IrDA devices over an IrDA port on a serial line. Covers IrComm for connecting via PPP over cell phones as well as several utilities to exchange data with PDAs. These programs were written by Tommy Bohlin <tommy@gatespace.com>. The port is more or less directly copied from Lennart Augustsson's <lennart@augustsson.net> NetBSD port.