tools

• sgp4 earth satellite calculator
  predict position and velocity for satellites from their TLEs
  download: sat-calc.zip [54K]
• offline rhyming dictionary [3.6M]
  self-contained rhyming dictionary you can save for offline use
• bitmap font sprite generator
  generate a bitmap sprite image from a set of characters
• gps dist
  calculate cumulative distance from a gpx file
• spectrogram
  live graph of frequency decibels from microphone data
• harmonic visualizer
  live graph of spectral slope (dBFS/Hz), second derivative (dBFS/HZ²), harmonics (dBFS), and harmonic delta (ΔdBFS)
• glynth
  glsl synthesizer