This page provides resources for agile developers. If you are just starting to learn about Lean we recommend the article "Agile Developers Guide to Lean Software Development" or the Executive Briefing on Why and How to Become Agility webinar. If you're looking for a good article on the essence of Kanban, read Alan Shalloway's article on Demystifying Kanban.
If you are using Kanban, take a look at the Kanban Clinic.
If you are using Scrum, take a look at the Scrum Clinic.