iv got my fitness pal, not sure if i paid or it was free.
top cash back which was free but i think you pay now
loads of free weightloss ones with recipies
groupon
travel zoo
wee chat
whatsapp
dominoes pizza 
ebay
tesco
hot deals
lego 4+
flick football lite
yummy burger
wheres wally
finger cutter
kids doodle,
loads of phonics and abc and number ones
spirit level 
and loads of work ones, forthose who work shifts, shift worker is fantastic