Gratis /ˈɡreɪtɨs/ is the process of providing goods or services without compensation. It is often referred to in English as free of charge (FOC) or complimentary. Companies, producers, and service providers often provide certain things free of charge as part of a larger business model or pricing strategy.

The English term gratis has its origins in late Middle English; from Latin. A contraction of gratiis, meaning 'as a kindness', which in turn stems from the root gratia meaning 'grace' or 'kindness'. It is widely used in the Afrikaans, Catalan, Czech, Polish, French, Dutch, Spanish, Italian, Portuguese, Romanian, Bahasa Indonesia, Scandinavian and German languages, with the same meaning.

In a standard business model where goods and services are exchanged for a monetary compensation, pricing of the goods is a fundamental element of the marketing process. While it would defeat the business model if companies provide all of their goods and services free of charge, it is common for them to provide limited amount of free goods in their promotional mix. Many companies often provide free samples to the press in order to generate media coverage for their products. Depending on the product, companies may provide free samples to prospective buyers.

Lyoto Carvalho Machida (Portuguese pronunciation: [liˈotu maˈʃidɐ]; born May 30, 1978) is a Japanese-Brazilian mixed martial artist from Salvador, Bahia, Brazil who fights as a light heavyweight in the Ultimate Fighting Championship. He is a former UFC Light Heavyweight Champion and is currently ranked as the #6 light heavyweight fighter in the world by Sherdog, MMAWeekly and Yahoo! Sports.

Machida was born in the city of Salvador as the third son of the highly ranked head of the Brazilian branch of the Japan Karate Association, Shotokan karate master Yoshizo Machida. Yoshizo moved to Brazil from Japan when he was 22 years old. There he met and married Lyoto's mother, Ana Claudia. Growing up in Belém, Lyoto began training in karate at the age of three and earned his black belt at the age of thirteen. He also began training in sumo at twelve and Brazilian Jiu-Jitsu at fifteen. He won a number of amateur karate tournaments, including the 2001 Pan American Karate tournament.

He was the runner-up in the 2000 Brazilian Sumo Championships in the 115 kg division. As an adult, he became Brazilian Champion twice under Taylor Swanson, and placed second in the South American Championship. He defeated American black belt Jiu-Jitsu fighter Rafael Lovato Jr. at L.A. Sub X. In addition to his sumo and karate achievements, he has a college degree in Physical Education. Lyoto's brother, Chinzô, is a Shotokan vice-champion (Australia 2006), losing only to number-one ranked Shotokan master Koji Ogata. Lyoto and Chinzô fought in a Karate Final 10 years ago in which Lyoto gave Chinzô a cheek scar that still exists today. His other brothers include Kenzo Machida, a TV journalist for one of Brazil's biggest TV stations, Take Machida and adopted brother Francisco Machida.

Chris Weidman (born June 17, 1984) is an American mixed martial artist and former collegiate wrestler. He is currently signed as a Middleweight with the UFC. Weidman attended Baldwin high school on Long Island where he was a Nassau County and New York State wrestling Champion. Weidman earned All-American wrestling honors at NCC before transferring to Hofstra where he became a Two-Time Division I All-American, placing 3rd at the NCAA tournament his senior year. Weidman graduated from Hofstra University with a Bachelor's Degree in Psychology.

Weidman trains and competes as part of the Serra-Longo Fight Team under the tutelage of Ray Longo and Matt Serra; Weidman currently competes in the middleweight division. In just his 3rd fight, Weidman fought a highly touted Uriah Hall for the Ring of Combat middleweight title in what was billed as a striker vs wrestler matchup; Weidman showed his striking prowess by knocking Hall out in dramatic fashion. Weidman qualified for and competed at the 2009 ADCC Submission Wrestling World Championship (with just 1 year of formal Jiu-Jitsu training) in Barcelona where he lost to world renowned Jiu-Jitsu practitioner André Galvão. As of 2010, multiple MMA ranking panels had Weidman ranked as high as the #1 ranked prospect in the world at 185 lbs. Weidman was also listed as the number one prospect in all of MMA in the 2011 Top 50 Prospects piece put out by MMARanked.com

Thomas Joseph "Tom" Lawlor (born on May 15, 1983) is an American mixed martial artist. He was a cast member of SpikeTV's The Ultimate Fighter: Team Nogueira vs. Team Mir.

Lawlor lives in Providence, RI. He, along with TUF alumni and K-1 vet Seth Petruzelli and Brazilian Jiu Jitsu Black Belt Mike Lee, owned and coached at The Jungle MMA - Orlando BJJ, MMA, Muay Thai The Jungle MMA and Fitness. Lawlor has recently relocated to Providence, Rhode Island and trains under Brazilian Jiu Jitsu Black Belt Tim Burrill, as well as working with the Team Aggression mixed martial arts team at Lauzon MMA in Bridgewater, MA.

Lawlor has made himself known by imitating other fighters (Art Jimmerson, Dan Severn, Harold Howard, and Genki Sudo) during the weigh-ins and octagon entrances. These impersonations, along with his tongue-in-cheek ring entrance routines (paying homage to Hulk Hogan and Apollo Creed amongst others) have made Lawlor something of a cult figure among fans. In 2010, Lawlor announced his intention to tone down his pre-fight antics.