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Atanua

Free - Jari Komppa
Atanua is a real-time logic simulator designed for educational use. It has an intuitive, OpenGL accelerated user interface, with which the user can place components and wires. Components include all common logic blocks, including gates, latches and flipflops, about 30 different 74-series chips, an 8051 microcontroller variant, various LEDs, buttons and 7-seg displays.
noise, spectrum, iacf, iacc, generator, sound, measurement, analyzer, oscilloscope, sweep, waveforms, pulse
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MSU NoiseGenerator VirtualDub plugin

Free - Graphics&Media Lab Video Group
The filter adds artificial noise of one common types (equidistributed, normaldistributed, colour stains, echo signal) to video stream. It can be used for testing, debuging and comparison of various denoising filters.
realtime, audio, debating, video, debate timer, speech, timer, shooter, super, contra, corps, action
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AirGrab WiFi Radar

Free - AirGrab
AirGrab WiFi Radar is a tool to display information about Apple Airport base stations and other WiFi (802.11b/g/n) wireless access points. Using AirGrab WiFi Radar you can determine most popular WiFi channels and select optimal channel for your WiFi network. Encryption status of network shows WEP, WPA, WPA2 modes of all immediately available WiFi networks.
reminders, parenting, wireless, alarms, kids, monitor, plugin, circuits, color stains, virtualdub, boolean, voip
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Universal Software Oscilloscope Library

Free - oscilloscope-lib
Fast universal oscilloscope GUI library - Real-time plotting component.
Advantages:
1. Performance: Over a million quantization steps of signal per second.
2. Versatility, convenient integration: the oscilloscope is executed as a DLL.
3. A good graphic interface: the oscilloscope looks like a separate window.
4. Convenient data export: data can be transferred via clipboard.
5. Reliable and robust - employs only the most basic API.
generation, nand, driver, echo signal, ssid, pink noise, simulation, asterisk, iax phone, 8051, movies, white noise
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Rainbow

Free - Optimal Designs Enterprise
Find best Spectral Estimation Method for a Power Spectral Density plot. A menu of 10+ spectral estimators from Steve Kay's textbook 'Modern Spectral Estimation' 1988 is available to choose from. The results differ dramatically from one estimator to another. Plus, varying input parameters and/or number of points may provide discrepancies. Observe how zero padding effects your results. See 50+ dB weak signal detection.
serial, voix phone, logic, soft phone, voix, microcontroller, teaching, learning, electronics, gui dll, power, private
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WirelessNetView

Free - NirSoft Freeware
WirelessNetView is a small utility that runs in the background, and monitor the activity of wireless networks around you. For each detected network, it displays the following information: SSID, Last Signal Quality, Average Signal Quality, Detection Counter, Authentication Algorithm, Cipher Algorithm, and more.
network monitoring, wiwi encryption, fourier transform, technical analysis, model, spectral analysis, servo, anolog, home automation, stocks, controller, control
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