In the competition to hire and retain the best and brightest workers , companies have gotten more creative with job perks and benefits . High salaries will never lose their allure, but employees are also drawn to the little and not-so-little extras a company provides.

Of course, workers arent offered free chair massages and gym memberships solely out of corporate benevolence. Mostly what companies are trying to do is keep their turnover costs down, and theyve figured out happy workers are more inclined to stay. One in four millennials changes jobs each year, according to a recent Gallup report, which isnt a good thing for businesses.

Here are some of the benefits that employers around the country are now offering, hoping to get you and keep you:

1. Help paying off student loans

PricewaterhouseCoopers broke ground in 2015 with a program that spoke to what is arguably the greatest source of worry among recent college graduates: how to pay off their student loans .

There are 44 million Americans with student loan debt, bringing the total U.S. student debt burden to more than $1.3 trillion , the federal government estimates. Yet only 4 percent of U.S. companies contribute to employees student debt payments, says the Society for Human Resource Management .

PwC offers $1,200 a year, for a lifetime total of $10,000 toward reducing the burden of student loans on the firms associates and senior associates with one to six years of working experience. That covers about 22,000 U.S. employees, or 45 percent of its U.S. workforce; more than 6,000 took advantage of the benefit in its first year. The program is especially appealing to millennials, who make up 80 percent of the PwC workforce, the company says .

And since good ideas spread, other companies have followed suit. Health care company Aetna now offers its 50,000 full-time employees matching loan payments of up to $2,000 per year for a total match of $10,000 per person. The catch, if you want to call it that, is that employees need to have earned undergrad or graduate degrees from accredited institutions within the last three years.

2. Free on-site health care centers

Were not just talking free flu shots here, but a full-service health clinic at the work site. Information tech giant SAS , a global company based in North Carolina, has a 35,000-square-foot medical facility and pharmacy on-site. There is never any cost to employees, their spouses, domestic partners or dependents for care. The center is managed by a staff of 53 that includes doctors, nurse practitioners, nurses, physical therapists and lab techs. No co-pays are ever collected its 100 percent free. Understandably, it is used by 90 percent of SASs workforce. In fact, 75 percent of employees use it as their primary care physician. The company estimates the on-site health center saved employees $1.12 million last year by avoiding out-of-pocket co-pays and co-insurance.

Its easy, free and not a major time-suck to get what ails you looked at.

SAS, which has appeared on pretty much every best places to work list, has been at the forefront of providing employee benefits for every life stage . And to no ones surprise, it has the lowest turnover rate in the tech sector.