Fityk is nonlinear curve-fitting and data analysis software. It allows data visualization, separation of overlapping peaks, and least squares fitting using standard Levenberg-Marquardt algorithm, a genetic algorithm, or Nelder-Mead simplex method. It knows about many functions (mostly bell-shaped, like Gaussian, Loretzian, Pearson 7, Voigt, Pseudo-Voigt, and Doniach-Sunjic) and user-defined functions can be easily added. It also enables background subtracting, data calibration, and task automation with a simple script language. It is mainly used to analyze powder diffraction patterns, chromatography, photoluminescence, infrared, and Raman spectroscopy, but it can be used to fit analytical functions to any kind of data.
amforth is an extendible command interpreter for the Atmel AVR ATmega microcontroller family. It has a turnkey feature for embedded use as well. It does not depend on a host application. The command language is an almost compatible ANS94 forth with extensions. It needs less than 8KB code memory for the base system. It is written in assembly language and forth itself.
Connect-k is a framework for experimenting with and testing general AIs for games within the connect-k family. This includes Tic-Tac-Toe, Go-moku (without removal rules), and Connect-6. The program features an attractive GTK+ interface, a convenient API, and several challenging AIs.
iDMC is user-friendly software for the simulation and analysis of non-linear models. It was designed both as a teaching and research tool, and is very easy to use (a user’s guide is available). Numerical calculations are performed on models included in the package, or any model formulated by the user and easily encoded (a few lines with no compilation necessary). The Java graphical user interface provides fast generation of graphical data of good quality, which can be saved as .png files. Hard computational tasks are delegated to a separate, small C library.
STPsim is an application that simulates and visualizes switches using the Spanning Tree Protocol. It features a GUI to build and control a custom network topology. A VPython frontend visualizes virtual switches and network cables in a 3D environment. To visualize STP-states, switches and ports change colors and captions in real time.
KiCad EDA is software for the creation of electronic schematic diagrams and printed circuit board artwork. It is a set of four programs and a project manager: Eeschema (schematic entry), Pcbnew (a board editor), Gerbview (a Gerber viewer (photoplotter documents)), and Cvpcb (a footprint selector for components used in the circuit design). Kicad is the project manager. It includes a 3D visualization feature.