ProjectLibre is an open-source and free tool for project management.
Official documentation is not very extensive, so I created this post to summarize some useful tutorials about this tool.
ProjectLibre tutorials
Project Libre Doc v0.3
https://pdfcoffee.com/projectlibre-doc-v03-pdf-free.html
https://docs.google.com/document/d/1ZSldKw6gC8iuriQPdckHfaxaWvwQhYxP_Do-I-dnbHs/edit?usp=sharing
Slideshows by user Hezequias Vasconcelos
http://www.slideshare.net/ProjectLibre/projectlibre-15-lesson-1-presentation-of-the-initiative
http://www.slideshare.net/ProjectLibre/project-libre15-aula-2-installation-requirements
http://www.slideshare.net/ProjectLibre/project-libre15-aula-5-reportsenus