GraphicsMagick is a robust collection of tools and libraries to read, write, and manipulate an image in any of the more popular image formats including GIF, JPEG, PNG, PDF, and WebP. With GraphicsMagick you can create GIFs dynamically making it suitable for Web applications. You can also resize, rotate, sharpen, color reduce, or add special effects to an image and save your completed work in the same or differing image format.
Download SoX - Sound eXchange for free. SoX is the Swiss Army Knife of sound processing utilities. It can convert audio files to other popular audio file types and also apply sound effects and filters during the conversion.
Free, Open Source Modular Synth Software Lets You Create 70s & 80s Electronic Music—Without Having to Pay Thousands for a Real-World Synthesizer | Open Culture
In the past decade or so, the analog modular synth—of the kind pioneered by Robert Moog and Don Buchla—has made a comeback, creating a booming niche market full of musicians chasing the sounds of the 70s and 80s.
Giving social networking back to you - The Mastodon Project
Mastodon is an open source decentralized social network - by the people for the people. Join the federation and take back control of your social media!