netbeans.apache.org - My favorite Integrated Development Environment (IDE) is NetBeans because it has multiple language support (Java, PHP, Javascript, etc.) and is free / open-source.
https://www.anaconda.com/ - For doing data science, or working in STEM (Science, Technology, Engineering, Math) the Anaconda distribution is the easiest (and free) way to get started. In addition to the Python and R programming languages, it has a full suite of...
builder.blender.org - Development Versions of Blender 3D - These versions have the latest features, but may be unstable. You can help test them and report any bugs.
NOTE: You should be careful about using development versions in production projects.
itunes.apple.com - Impress Remote is an iOS application that allows you to control your LibreOffice Impress presentation using your phone. An Android version is also available.
play.google.com - Impress Remote is an Android application that allows you to control your LibreOffice Impress presentation using your phone. An iOS version is also available.
www.libreoffice.org - Open source office suite of programs: document editor, spreadsheet, presentations, math formulas, database, diagram and drawing applications.
www.w3schools.com - W3Schools has a complete online collection of web programming tutorials including HTML, CSS, Javascript, Perl, Java, PHP, Python, and XML. Pretty much everything you need to learn for programming for the client or server!
https://cgcookie.com/ - CG Cookie teaches how to use Blender 3d, Unity, and sculpting. I recommend starting with their 2d basic art concept courses. They have the individual courses available, but they've organized the course into "learning flows" that track...
https://krita.org - Krita is a free and open source digital painting software. Perfect for concept art, texture painting, creating illustrations or comics. I love how well it integrates with my graphics tablet and pen. Very powerful and full-featured.
https://www.blender.org - Blender is a free and open source 3d animation software. It is incredibly powerful, and a full featured to support your entire 2D or 3D animation workflow.