Before babysitters and in the tradition of Romulus and Remus, parents craving a night alone would entrust their progeny to the most responsible-looking golden retriever they could find. Leave childcare to capable co-eds instead with today's Groupon: for $30, you get a three-month mom's membership to MommyMixer (a $90 value).

Founded in Austin by Mary Sullivan Cooper, MommyMixer connects families and college-age babysitters through an easy-to-navigate website. Parents create online profiles indicating their global position and offspring's ages as well as days and times they usually need help. They can then search available household helpers to look after their little people and lend a hand with light chores. Most sitters do more than just sit; they tutor, coach, or are English-Esperanto bilingual, and more than happy to share their skills with their willing wards. A pinwheel rating system holds both sides accountable for how the jobs go, based on timeliness, mutual respect, and overall good cheer. An introduction service only, MommyMixer does not prescreen candidates or negotiate hourly rates.