Cool Apps for Schools - MathsBot is a website which has lots of manipulative tools than can be used on the interactive whiteboard. Some are tablet friendly also. Check them out here:
Interactive Resources Maths Packs - BETT Award Winning Resources for the Primary Classroom
Add and Subtract with Dienes within 100 | Teaching Resources
Base 10 Interactive Place Value Board Game (teacher made)
ictgames || Place Value Teaching Resources
Digital tools | Maths tools for teachers | White Rose Education