Unpaywall

Unpaywall

Access paywalled scientific papers through browser extension.
Redirect to open source version of paper, if available.
50% - 85% chance of locating open source copy of text.

Open souce code on GitHub: https://github.com/Impactstory/unpaywall 

Python

Python

Used for:

1. full stack development (web dev)
2. scientific and numeric computations
3. programming education
4. desktop GUIs
5. software development

Open source programming language with robust community. Originally created in the early 1990s, Python has been around, developed, and implemented into a plethora of products.