Mint.com (iPhone, iPad, Android)
Free, all-purpose app syncs bank accounts, credit cards, tracks expenses
Shoeboxed Receipt Tracker (iPhone, iPad, Android)
Free, take picture of receipt to digitally archive
Bump Pay (iPhone)
Free, split and pay bills and more by bumping phones with another user
Belly Card (iPhone, Android Free)
Scan code on phone at dozens of locations for tailored deals, benefits