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| Screenshot |
Name |
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![Black Cat Systems [Graph Paper Maker]](http://www.padtube.com/.cache/screenshots/scr28012_list.gif) | Create your own custom sheets of graph paper. You have complete control over the graph characteristics.
more... | Free to try
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![Black Cat Systems [Atomic Mac]](http://www.padtube.com/.cache/screenshots/scr28303_list.gif) | Periodic table of the elements software. In addition to the usual information found in such programs, it also contains a wealth of nuclear information on each isotope, including half life, decay mode, and daughter products.
more... | Free to try
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![Black Cat Systems [DX ToolBox]](http://www.padtube.com/.cache/screenshots/scr28312_list.gif) | DX Toolbox gathers information on solar and geomagnetic conditions that affect radio propagation. It also features several propagation forecasting tools, and is ideal for the ham radio operator, shortwave listener, or other radio enthusiast.
more... | Free to try
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![Black Cat Systems [Health Tracker]](http://www.padtube.com/.cache/screenshots/scr28621_list.gif) | Health Tracker is a simple yet powerful program which helps you keep track of and graph any health related measurement. For example, if you are diabetic you could track your blood glucose levels. You could also use it to track your weight.
more... | Free to try
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![Black Cat Systems [Elmer]](http://www.padtube.com/.cache/screenshots/scr28807_list.gif) | Elmer will help you study for your amateur radio exams. Elmer covers all elements, and prepares actual sample exams. Each exam is graded, and you get to see which questions you missed, and the correct answer.
more... | Free to try
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![Black Cat Systems [RF ToolBox]](http://www.padtube.com/.cache/screenshots/scr28866_list.gif) | Takes you step by step through the design of these antennas: Dipole Fat Dipole Yagi J-Pole Super J-Pole Log Periodic Cubic Quad Vertical Helical. Also performs various transmission line and network calculations.
more... | Free to try
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![Black Cat Systems [Morse Mania]](http://www.padtube.com/.cache/screenshots/scr29767_list.gif) | Morse Mania is a morse code tutor for the Macintosh. Morse Mania provides the following three modules to help you learn morse code: Learn Characters, Guess a Character, Copy Groups.
more... | Free to try
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![Black Cat Systems [Audio ToolBox]](http://www.padtube.com/.cache/screenshots/scr29838_list.gif) | Audio Toolbox is an audio function generator for the Macintosh. 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 - both pink and white.
more... | Free to try
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![Black Cat Systems [iUnit]](http://www.padtube.com/.cache/screenshots/scr31140_list.gif) | Measurement unit conversion program. You can convert between 1545 different units quickly and easily. iUnit also displays the values of 91 physical constants.
more... | Free to try
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![Black Cat Systems [Audiocorder]](http://www.padtube.com/.cache/screenshots/scr31527_list.jpeg) | Audiocorder is a sophisticated yet easy to use audio recording program for your Macintosh. Audiocorder makes it easy to record music, as well as make spoken recordings, and transfer recordings to iTunes, to add to playlists, or convert to mp3 format.
more... | Free to try
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