Here's 3 that have been recommended to me over the past week:
www.40acts.org.uk - '40 days of giving back, doing good and doing Lent generously'
www.lentmenschallenge.blogspot.co.uk - '40 Days of Lent Men's Challenge'
Keep the Fast, Keep the Feast - A blog post by Peter Leithart on Lent, fasting, feasting and Jesus'