Free videos

Pixabay free videos License: public domain. Pexels free videos License: Creative Commons Zero. Coverr free videos All videos on these websites can be used for private or commercial purpose.

Free images

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How to Make Money Online

Google Adsense With Google Adsense you may earn money via placing ad code to your website and Google will pay you for every click. You need to sign up for a Google account if you do not have already Visit Google Adsense and generate code for ad Place the code on your website You can ... Read more

Do not add social widgets to your website

Social widgets create visual noise and distract user's attention from content Social widgets slow down the page load and consumes some user’s internet bandwidth Social widgets is used by small amount of users and there is no need to show them for everyone; Users can share the page on social network by copying url-address and ... Read more

Introductory programming language

The best introductory programming language is Python. Python is easy to start, readable and extremely powerful language. It is widely used in web, data analysis and science. Stack Overflow Trends on programming languages Visualize Python code execution with PythonTutor

Akin's Laws of Spacecraft Design

1. Engineering is done with numbers. Analysis without numbers is only an opinion. 2. To design a spacecraft right takes an infinite amount of effort. This is why it's a good idea to design them to operate when some things are wrong. 3. Design is an iterative process. The necessary number of iterations is one ... Read more