Accessmaths
Sharing ideas and resources
Teachers
Pupils
About
Shine and write
Visual aids and puzzles. Same site as starter of the day so some overlap
Activity cards
Not interactive.  could be printed or displayed on board.  These are graded activity cards.  Could be used as starters or as activities.
Starter of the day
Brings up a calender.  Click on the date and get a puzzle to use (some great some not so good)
Northumberland NGFL
This site displays and links to various interactive numeracy games
Active maths
Requires subscription but you can go on most things for a few minutes before a password message pops up.
Stan ground college
A list of puzzles that would be good for a settler or a starter to discuss
flashymaths games
Page full of games to play
mymaths
Again requires subscription but there are sample pages available
birmingham 
Birmingham city council web site.  Click on resource tab at top there are various links to games and interactive site that can be used as class starters