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Unlimited vacation and ping-pong tables won't solve every workplace problem, but employee perks and benefits still can help with the mood at an office.

SEE ALSO:Facebook Interns Probably Make More Money Than You

Jobs site Glassdoor released a list of 20 companies that are offering unique perks. The list -- not ranked by quality -- was based on the hundreds of thousands of benefits reviews shared by employees on the site.

Here is the list of 20 companies with one unique perk, followed by an employee quote summarizing the benefits:

1. Four months of paid paternal leave -- IKEA

“Great pay, amazing benefits, and company culture is strong. Although it is a worldwide company, you feel like a family. Vacation/sick time off is great. Having been with the company many years, I get five weeks of PTO and a week and sick time. The building itself is a major benefit: lockers & showers, computer rooms, quiet/prayer room, coworker-only restaurant that serves a different meal each day for only $3. Some locations have gyms and free bicycles to rent, lactation rooms for new moms, etc," writes a current shopkeeper.

2. On-site gym with Crossfit -- Reebok

Reebok Ambassador Batu Khasikov joins forces to help launch Reebok's The Sport Of Fitness Has Arrived campaign on May 15, 2012, in Moscow.Credit: Oleg Nikishin/Getty Images

"The company mission and values are clear, communicated often, and embraced. It's ok to take an hour for fitness throughout the day and fitness events are encouraged to participate in," writes a current marketing manager.

3. Soccer tournament -- Bain

“Fantastic team spirit, worthy of the old ‘A Bainie never lets another Bainie fail’ expression which is supported through local and global trainings where employees come together from around the world to share experiences and take on new challenges," writes a current employee.

4. Gender reassignment surgery -- Goldman Sachs

“Goldman Sachs is devoted to people development and providing high achievers opportunities to grow professionally. As an employee, you are surrounded by intelligent, driven colleagues and have the benefit of a culture that is focused on bringing out the best in you," writes a current vice president.

5. Healthcare coverage for interns -- Facebook

“The worst thing is that there are so many perks and benefits you may not know about all of them,” writes a current employee.

6. Pet health insurance -- Scripps Health

Credit: DeAgostini/Getty Images

"Good benefits, especially the Wellness program, which if all requirements are met, the employee's benefits are at no-cost for the next year. Lots of additional benefits available; pet insurance, legal assistance, etc. if you want to purchase those," writes a former employee.

7. Full tuition reimbursement -- Starbucks

"Benefits, lots of breaks, they treat you like a human being, great place to work. Tuition reimbursement and stock options," writes a former barista.

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8. Parental leave policy -- American Express

“AmEx has always treated me well as an employee. My spouse had serious health problems some years ago, and my leaders were very compassionate, and allowed me to work from home full time until she recovered. Good pay, good benefits, good people to work with for the most part," writes a current graphic designer.

9. $60 wellness stipend -- Eventbrite

“What I love the most about Eventbrite is the office/work culture that it has created. I have never experienced anything like it before. The company proves over and over again that it truly cares for their employees in each department," writes a current employee.

10. 20% store discount -- Whole Foods

The 365 by Whole Foods Market store in the Silver Lake neighborhood of Los Angeles, Calif.Credit: patrick t. fallon/bloomberg via getty images

“They created an environment where you are motivated to work hard and that's enjoyable. They give great benefits to their employees. The upper management seems to care a lot of their employees," writes a former prep food team member.

11. Free Double-Double beer -- In-N-Out

“Extremely flexible with scheduling, you work with similar personalities so everyone tends to get along. You move up quickly, you genuinely feel appreciated 9 times out 10, and a free meal every day that you work. Great pay and excellent benefits for a rewarding job," writes a current employee.

12. Two sabbatical programs -- Deloitte

“Great company to work with. Collaborative environment in which experienced hires will not be left out. Partners will actively support your career progress," writes a current employee.

13. Free access to SF Museum of Modern Art -- Gap

The San Francisco Museum of Modern Art (SFMOMA).Credit: JOSH EDELSON/AFP/Getty Images

“Very comprehensive superiors. Flexible hours. Great team and great work environment. Very laid back style you can dress as you like. Great employee discount," writes a current assistant.

14. $800 “StayFit” reimbursement program -- Microsoft

“The best things were the 401K (Microsoft would match up to 50% of max) and the employee stock purchase plan. Also the Stay Fit options were good (could go to a gym or get $800 to spend on fitness related activities/equipment or other things)," writes a former employee.

15. “Own the Way You Work” program -- Swiss Re

“Diverse, supportive, knowledge company, good benefits, encourage horizontal and vertical moves, good global opportunities, professional, canteen food, market leader, own the way you work," writes current claims specialist.

16. Share paid leave -- Amazon

Credit: pete endig/dpa/corbis

“Great benefits all around. Best insurance I've ever had, didn't have to worry about the bill I'd receive a month later after going to the doctor. I never paid anything to the doctor or received a bill for any of my son's well-baby visits," writes a former fulfillment associate.

17. 401k with 8% matching -- USAA

“Excellent culture and environment where they truly care about serving the members and finding new innovative ways every year to make their lives easier. Great benefits, work-life balance, and excellent coworkers to work alongside," writes a current software developer.

18. Confidential counseling -- Southwest Airlines

“Ability to make a difference, senior management listens to all ideas for improvement, genuine care for employees, competitive salary, awesome benefits, cash bonus offered for reaching certain metrics," writes a current senior manager.

19. Car washes, haircuts, dentist -- Genentech

Genentech headquarters.Credit: justin sullivan/getty images

"Great place to work due to culture, benefits, talented people. Mature processes and tools. Opportunities available locally and globally. Diversity and inclusion are central and focused on," writes a current director of global product management.

20. 40 hours to volunteer -- Timberland

“Employees are very community service minded and passionate about the brand heritage and products. Great work environment with lots of perks,” writes a current employee.

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