Iphone 3g camera and photo editting apps

Hi

i got iphone 4 which burnt in electricity shock while on charge nw i got iphone 3g which don't allow me to get best camera and photo editing apps coz it got old software so i'm a social person i need apps for photo editing and camera colour effects and photo collage i need sum apps which are best for this and work great on iphone 3g coz i can upload my photos after editing thanks i need it its urgent till i get my new iphone 5 i hv to work on iphone 3g please do help i tried sum apps on app store but it say you need to update your phone to get it which i can't.

please do help!

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