College campuses have spurred a lot of startups over the years.

Facebook famously started at Harvard, Google started at Stanford, and Snapchat was founded by Stanford frat guys. 

Some programs, like the Thiel Foundation, encourage students to drop out of school to start a company.

But some students are sticking it out and building startups while enrolled in college. 

GymFlow wants to help you beat the crowds at the gym.

University of Southern California 

GymFlow is part of USC’s Viterbi Startup Garage. It helps people determine before they show up to the gym just how crowded it will be. 

It works by tapping into gym’s IT center to provide real-time traffic data. GymFlow also uses that information to predict how crowded the gym will be in the future. 

Planana helps event planners know how many people are actually going to show up.

University of Southern California

Planana aims to make events flake-proof. It provides event organizers with a flake rating so they can better gauge just how many people are actually going to show up. 

Fei Xiao and Anna Sergeeva founded the company trueRSVP in 2011. Planana is a spin off that offers of variety of other services to event planners. 

Planana’s clients include Saks Fifth Avenue, AlwaysOn, and DEMO. 

CentriCycle makes medical tests possible in places without access to health services.

University of Michigan 

Carolyn Yarina founded startup CentriCycle to make medical tests possible in the developing world. 

She’s created a manually powered and sustainable centrifuge so health workers can prepare bodily fluids for diagnostic tests. 

See the rest of the story at Business Insider