<p>Homebrew is a software package manager for Apple's OS X operating

system. Homebrew installs the free and open source software that OS X

users need that Apple didn't install by default.</p>

<h2><a href="https://houdiniproject.org">Houdini</a></h2>

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<p>Houdini is an all-in-one fundraising platform developed in Ruby on Rails. It’s licensed under AGPL/LGPL

and is available, without cost, to anyone in the world. We help nonprofits, people, and movements thrive and

maintain themselves.</p>

<h2><a href="https://computinginresearch.org/">Institute for Computing in Research</a></h2>

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trains students finishing 10th, 11th and 12th grade to do rigorous

scientific research using free software. The Institute recruits students who

might not otherwise have access to scientific apprenticeships, offers them a

stipend and pairs them with volunteer mentors who train them to use free

software operating systems and research tools.</p>

<h2><a href="https://inkscape.org/">Inkscape</a></h2>

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<p>Inkscape is an Open Source vector graphics editor, with capabilities

similar to Illustrator, Freehand, CorelDraw, or Xara X using the

open-standard Scalable Vector Graphics (SVG) file format. Inkscape's

main goal is to create a powerful and convenient drawing tool fully

compliant with XML, SVG, and CSS standards.</p>

<p>In contrast to raster (bitmap) graphics editors such as Photoshop or

Gimp, Inkscape stores its graphics in a vector format. Vector graphics