1. Forge dataset. http://github.com/materials-data-facility/forge
2. Mailgun, open sourcing our email signature parsing library. http://www.mailgun.com/blog/open-sourcing-our-email-signature-parsing-library/
3. SVM, Scikit Learn Library. http://scikit-learn.org/stable/modules/svm.html
4. Talon, the Mailgun’s Python library. http://github.com/mailgun/talon
5. Text Minner, Email Signature Extractor. http://appsource.microsoft.com/en-us/product/office/wa104380692