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 - [Calibre-Web](https://github.com/janeczku/calibre-web) Web app for browsing, reading and downloading eBooks stored in a Calibre database
 - [Custom Search Engine](https://cse.google.com/cse?cx=000661023013169144559:a1-kkiboeco) A Google custom search engine specifically for ebooks
 - [Exploring over 1,800 Calibre ebook servers](https://blog.chrisbonk.ca/2018/12/knowledge-is-power-exploring-over-1800.html?m=1) Blog post detailing how to use Shodan to find Calibre ebook servers
+- [DeDRM_tools](https://github.com/apprenticeharper/DeDRM_tools) DeDRM tools for ebooks.
 
 ## Magazines
 - [PDF Giant](http://pdf-giant.com/) Various categories of downloadable PDFs