Notepad++ is a free (as in "free speech" and also as in "free beer") source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GPLLicense.
Apache OpenOffice is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It can be downloaded and used completely free of charge for any purpose.
dig.ccMixter Music discovery site operated by ArtisTech Media, founded by Creative Commons. Offers free to use music, even in commercial projects and you only need to give credit to the musicians.
Convert is a free and easy to use unit conversion program that will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy, and many others, including the ability to create custom conversions!
GIMP is a free and open-source raster graphics editor used for image retouching and editing, free-form drawing, converting between different image formats, and more specialized tasks. This program has a similar feel to Photoshop.
Pixabay.com is an international, copyleft and free-to-use website for sharing photos, illustrations, vector graphics, and film footage.
SketchBook Pro, also referred to as SketchBook, is a raster graphics software application intended for expressive drawing and concept sketching.
FileZilla is a free software, cross-platform FTP application, consisting of FileZilla Client and FileZilla Server. Client binaries are available for Windows, Linux, and macOS, server binaries are available for Windows only.
Placeholder.com is a free image placeholder service for web designers, serving billions and billions of images each year.
CircuitMaker is electronic design automation software for printed circuit board designs targeted at the hobby, hacker, and maker community. CircuitMaker is available as freeware, and the hardware designed with it may be used for commercial and non-commercial purposes without limitations.
LTspice is freeware computer software implementing a SPICE electronic circuit simulator, produced by semiconductor manufacturer Linear Technology, now part of Analog Devices.