FerFT is a multi-purpose spectral analyzer based on the successive Fourier transformation method. It features an input signal monitor which can sample input signals through a microphone with various sample rates and show them graphically on the panel. It also lets you calculate power spectra successively along with sampled input signals and show them graphically on the panel. Finally, it provides a filter to modify spectra and regenerate signals from them.
ElectricFormula is a program that can help with electronic based projects or problems. It can calculate electric power, resistance, current, or voltage. If given two of these variables as input, it can determine the other two. For example, if you want to calculate the resistance, you will have to supply the value for the electric power and current or you can supply the value of the power and voltage.
The CBOLD framework is a set of C++ classes and related source code for capturing board-level electronic designs. It allows the designer to capture and process an electronic board-level design using a text editor (or IDE) and a C++ compiler. It provides a concise, intuitive notation for schematicless capture of board-level designs. Instead of entering a schematic into an EDA tool, the designer creates a C++ program that describes the design and the desired outputs. When the program is compiled and run, it verifies the legality of the design and writes output files (CAD layout netlist, bill of materials, FPGA constraint files, etc.) to disk. Code primarily consists of definitions of modules, which are analogous to pages of a schematic design.