Here's ones I've done/known about:
Chocolate morning
Scarecrow trail
Ladies shopping night/morning where you get commission/set fee for table, charge admission
Fashion show/clothes sale party (someone comes and sells kids/adults clothes from shops/catalogues etc. - commission and admission charge.
Quiz sheets - make up a quiz, sell sheets for £1 to parents/through local shops etc. Highest number right wins £10 etc after closing date. Display answers on notice board.
Bottle stall at fetes - have a board with 30 squares on. Put 30 bottles - perfume. wine, nail polish, pop etc on. Have 100 blank lolly/craft sticks, 30 numbered ones. Mix them up in a bag, charge 20p a stick/£1 for 5. Numbered ones get corresponding prize. Ask for donations of prizes from businesses/shops/parents. You'll need about 60 prizes as you replace them so the squares look full. (Alcohol only for kids who have adults with them)
Barnardos sponsored toddle at a nearby zoo, them park etc - we got discounted entry.
Gym bags/tea towels/mugs printed with the kid's drawings etc - plenty of companies do these.
Printed school logo bears/school sun hats/ t-shirts etc.
Bag packing at supermarket in return for donations
Get Barclays to match your funds raised at an event.
Community grants/sure start/awards for all/lottery fund.
Themed party night - if can't have it at school, hire a hall and have a pirate/beach/halloween theme etc - stalls/games/food/disco etc - everyone chips in time or items.
Might think of more later!!