Biolinks is a project mainly written in ..., it's free.
The Biolinks extension for Google Chrome
This is the Biolinks extension for Google Chrome. It can parse a website and highlight relevant biolinks.
What is a Biolink? It's an identifier that describes a piece of information in a biological database.
What functionality does the Biolinks extension provide? The extension transforms plaintext Biolink IDs into rich links that point to database pages at the NCBI and elsewhere.
Biolinks currently recognizes the following identifiers: