Tabundle is developing software to aggregate multiple transactions on a single credit or debit card into a single transaction at bars and restaurants. This reduces credit card processing fees. The software integrates with POS systems and identifies when a card is swiped multiple times, delaying additional charges until end of day to process as one transaction. Testing at a sample restaurant showed potential to save over $7,000 annually in fees. The founders aim to launch beta testing in May 2012 and expand throughout New England in the second half of the year.