Scrum

http://plan.io/blog/post/132075702083/scrum-a-collection-of-some-of-the-best-resources
What is scrum

https://www.reddit.com/r/scrum/comments/3o7ls2/does_scrum_really_work_i_mean_really/
Why doesn’t scrum work for me?

http://www.aaron-gray.com/a-criticism-of-scrum/
https://medium.com/swlh/agile-is-the-new-waterfall-f7baef5d026d
Why should I hate Scrum?

https://www.atlassian.com/agile/kanban
What is Kanban (Extra)

Tools for scrum

https://www.zenhub.io/
Full fledged scrum tool, can only be used inside GitHub. Only for Chrome though.

https://waffle.io/
Easy to use agile function that integrates with GitHub.

https://trello.com
The allround best way to use when you don’t use GitHub.