Free Software for Black Cat Systems

Graph Paper Maker lets you create your own custom sheets of graph paper. You have complete control over the graph characteristics. X and Y axis can independently be set for linear or log scale. Selection from a dozen standard paper sizes, or custom create...

iUnit converts between over 1400 different units of distance, mass, volume, velocity, density, and other types of units. iUnit is perfect for students, engineers, scientists, and other professionals who need to quickly, easily, and accurately...

RF Toolbox is an antenna design and electronics or electrical tool package. It takes you step by step through the design of the antenna as: Dipole, Fat Dipole, Yagi, J-Pole, Super J-Pole, Log Periodic, Cubic Quad, and Vertical and helical. It also...

Using no additional hardware, you can produce sine, square, triangle, and sawtooth waveforms of any frequency up to 22 kHz, as well as generate noise.You can generate up to 13 different waveforms. Each waveform can be routed to either the left or right...

DX Toolbox searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. It also contains several propagation forecasting tools.It displays in real-time the following important readings:Solar Flux...

Elmer creates sample tests to help you prepare for your ham radio written examination. It contains all FCC question pools for each of the three written exams: Technician, General, & Extra. Elmer will grade your sample test, showing you which questions...

The Atomic Mac is a periodic table of the elements for the Macintosh. In addition to the usual information found in such programs, The Atomic Mac also contains a wealth of nuclear information on each isotope, including half life, decay mode, and daughter...

The Atomic PC is a periodic table of the elements for Windows. In addition to the usual information found in such programs, The Atomic PC also contains a wealth of nuclear information on each isotope, including half life, decay mode, and daughter...

Elmer creates sample tests to help you prepare for your ham radio written examination. It contains all FCC question pools for each of the three written exams: Technician, General, & Extra. Elmer will grade your sample test, showing you which questions...

DX Toolbox searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. In addition, the last month's worth of Solar Flux, A-Index, K-Index, Sun Spot Number, and background X-Ray Flux are plotted. Maps...