A keyword search in Google for "practice typing drills" reveals several free online typing websites as of July 2015. Approved-Websites.org provides Keyboarding Practice, which offers 17 drills to improve typing skills and four exams to test progress. TypingOnline.co.uk also provides keyboarding practice drills.
LearnTyping.org has beginner lessons and typing tutorials for the advanced user. There is video instruction with the lessons, as well as instructions on proper finger placement and posture before the start of every lesson. There is no software download required, as the characters are entered within the browser in the provided fields. The Typing Success eBook is available for purchase for those who want to develop their skills further.