USA Lacrosse offers their members a mobile application that gives you access to a number of drills and games, practice plans, and other resources.  Follow this link to learn more about this application.  

JM3 Sports has a series of videos available for free that cover how to coach youth lacrosse, practice planning, offensive and defensive sets, and drills and games at all levels.  JM3 sports is owned and operated by Jamie Munro who has experience coaching at all levels of the game including College and Professionally.  Follow this link to access this content.  You will have to register for a free account to access the video content.  Those that do register will also receive access to his weekly email blog that has additional content.