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The basic idea...

"The basic idea behind open source is very simple. When programmers on the Internet can read, redistribute, and modify the source for a piece of software, it evolves. People improve it, people adapt it, people fix bugs. And this can happen at a speed that, if one is used to the slow pace of conventional software development, seems astonishing...
...The Open Source pages exist to make this case to the commercial world."    - Introduction to Open Source -

* Chroma Doze (white noise)

market download Now you can sleep soundly with the soothing algorithms of Fourier analysis. Just sketch your favorite spectrum, and listen to a generated stream of white noise (or more precisely, colored noise). If sleep's not your thing, you can also use it with headphones to drown out neighbors, or tweak the settings to erode eardrums and frighten small children.

Notable features:
- No ads or weird permissions
- Doesn't just play a looped sample
- Relatively power-efficient
- Runs in the background
- Save your favorite sounds in the Memory list
- Contains math
- Open Source / Free Software (GPLv3 license)

If you'd like a sleep timer, these two apps are compatible, and (the last time I checked) free with minimal permissions:

Author: Paul Marks
Version: 3.5.5
Market link: net.pmarks.chromadoze
Web site:

Source code:
Code license:
Market downloads: 50,000-250,000
Market rating: 4.4 / 5.0
Category: Top:/Applications/Media & Video

Added: 2012-11-29
Updated: 2016-01-25
Hits: 1575

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