In the early days of the App Store, Bump was a popular way to exchange photos, links and other items between iPhone owners, augmented by the fact that iOS to date doesn't support standard Bluetooth file sharing.
Six years later, we have AirDrop as the preferred method of beaming documents, images and just about anything between nearby iOS 7 device.
Be that as it may, if an Android-toting friend asks you politely to wirelessly transfer a photo you took with your iPhone - or a contact card or perhaps a location - over to his device, the cross-platform Bump app is still the best solution.
To all the fans of the software out there: I hope you won't mind that Google has now snapped up Bump Technologies and its namesake app for an undisclosed sum - the search monster's first acquisition since it paid $1 billion for Waze back in June...