Word Problems - Levelled SATs questions: TES
Resource Word Problems - key stage 2 Sats questions organised by levels 2, 3, 4, 5 and 6. Mark scheme and notes also added as an additional file. Word files for easy editing.
Word problems in context: Transum
Website Useful word problems for display . Two levels from the excellent Transum, problem solving site.  
Multi-step word problems- Primary Resources
Website Wide selection of word problems and PowerPoints.