Some great resources to help practise Times Tables from the blog of primary school teacher, ICT subject leader and prolific blog writer Tom Barrett. They are:
Multiflyer – A wonderful resource which Tom discusses in more detail here.
BBC Skillswise Times Tables – a classic on the Skillswise part of the BBC site.
Maths Trainer – part of a series of excellent resources from the Maths is Fun website.
Multiplication Puzzle – This resource is flexible enough to allow you to tailor it to individual needs and offers valuable practice.