Check out some of the more active Rock Band authoring groups below (listed in alphabetic order)

AGLSolutions es responsable del lanzamiento de la primera banda de Sudamérica para el juego. El equipo está integrado por músicos, programadores, jugadores de la plataforma y desarrolladores de material y aplicaciones web 2.0. Aparte de esto, somos la compañía con más experiencia colocando bandas en Español en Rock Band.

Our goal at Alt-Strum Productions is to be the forerunners in a new age of digital distribution and artist promotion for the music and gaming industries. Working through Harmonix and the Rock Band Network, we will personally author, from an artist’s original work, programmed content which will be sold as playable Rock Band tracks to an audience of millions that might otherwise go untouched. We will also promote the Band and sales of the Rock Band tracks through our website and other viable channels. We believe that the music gaming industry is poised to be the next revolutionary form of interactive digital distribution and our goal is to assist bands from every genre into making that transition, reaching more potential listeners and ultimately promoting themselves and their sales in all forms of distribution.

The Authority are situated a stone’s throw from Harmonix headquarters in Cambridge MA, and maintain close ties. The three Authority founders, having prepared The Slip’s “Even Rats” for Guitar Hero 1 (considered an early Guitar Hero classic) were invited to take part in the closed Beta testing for the Rock Band Network (RBN). After extensive training with Harmonix, and subsequently Authoring many songs for the initial release of RBN, The Authority were included on Harmonix’ exclusive Recommended Authors List, a group of fewer than twenty-five people worldwide.

Chart Toppers Authoring, LLC, is a group of musicians and avid Rock Band players who seek to bring both lesser-known and well-established musicians and bands to the Rock Band platform. Being from the Nashville area, we are surrounded by great music and a large variety of musicians. We want as many people to be exposed to the genius and beauty that is music. As artists and Rock Band players, we know how important it is to preserve your vision and present it to the world. What better way to do it than through Rock Band? We take your songs, add accurate note charts, and design the venue and animations to reflect your song in the best and most awesome way possible. We work together with you; nothing passes until you’re completely satisfied. Let us help you reach the top of the charts!

DLC Quickplay has been bringing Rock Band players together for years, and now we’re bringing music to Rock Band! Adapting a song for Rock Band requires a special set of skills, and also a lot of time and dedication. If you put your song in the hands of a company that already knows the rules of the game and how to use the RBN authoring tools, that just means you can spend your valuable time creating music, which is what you love to do. Rock Band is what we love to do. It’s a win-win situation!

We’re a small little group of musicians, gamers, and engineers. We’re a younger crew, with a number of college students. We take stuff seriously enough to do a good job while trying to stay kids at heart. We believe doing a good job is more important than making a ton of money. We believe in giving the little guy as much love as the big guy.

For symphonic and classical music, including film scores, opera, piano and chamber music, this top-of-the-line digital orchestra is run by conservatory-trained professional musicians, composers and conductors who have been creating recordings of orchestra music since 2003. Author of the first ever classical tracks on Rock Band Network.

Gamer Beats was formed by a small group of video game industry professionals, with design and production experience spread across such companies as EA, THQ, and F-I. We are all quite crazy about music and Rock Band, and so decided to pursue our passions and become a Rock Band charting group. Gamer Beats will initially focus on bringing well known bands in under-represented genres to the RBN, in addition to helping indy bands we love share their music with a wider audience.

We turn your music into playable tracks for the best-selling game Rock Band. The Rock Band Network is a revolutionary system that will allow bands, studios and record labels to create and sell playable game content from their master recordings using the same professional tools used by the makers of Rock Band.

Music Game Studio can help you tap into the power of the Rock Band Network®, taking your master tracks and turning them into game playable versions for sale on MTV’s Rock Band Network® store. Music Game Studio, founded and led by Producer/ Engineer Dan Rudin, is a team of award winning engineers and programmers highly skilled in both audio production and game audio design.

Offbeat Entertainment is a Rock Band Network authoring company based out of Denver, Colorado. We have a well-rounded, professional team that includes game programmers, audio engineers, and musicians that have been trained by Harmonix. Our team prides itself on creating a fun and entertaining experience for your fans that they will never forget! Offbeat has been fortunate enough to work with some major artists like Evanescence, Third Eye Blind, and The Shins as well as local favorites like The Knew and Common Anomaly. Visit our web site to learn more about how you too can sell music through the Rock Band Network and connect with your fans in whole new way.

The Rock Band Network is an initiative by Harmonix Music Systems to allow artists and labels to include their music in the Rock Band video game series. Ozone Entertainment is proud to be a part of the RBN, paving the way with fun and creative ways to take music games where they have never gone before.

We are an experienced team of individuals designed to work together with musicians, bands, and record labels to bring music into the Rock Band gaming platform through the Rock Band Network. Through streamlined processes, focused expertise, and quality control measures; our team aims to maximize sales and exposure for songs and artists as quickly as possible. Aside from original recordings, we professionally author all content required for submission, including: multi-track stem mixing, note charts, in-game camera, staging, animation and lighting events in order to deliver a fun, accurate, and musically engaging experience for all gamers to enjoy. Joseph Cirri, Sean Feica, Andrew Dovichi, Greg Litvin, Andrew Funk, Dave Barley, and Nick Bruno traveled to Boston on March 2nd, 2009 [four months prior to RBN being announced] for the first meeting concerning what would eventually be known as the Rock Band Network. Harmonix explained what the Rock Band Network was going to be and how they wanted our help with getting the community off the ground.

RockGamer Studios took an intensive course in Rock Band authoring at Harmonix HQ in Cambridge, MA. Only a select few individuals were offered the chance to be personally instructed by the game’s development team. We’ve learned tricks from the masters that have helped raise the quality of our products one step above the competition. Our team members have worked for top-tier video game companies such as Electronic Arts, THQ, and Ubisoft. We understand the game development process. We know what gamers are looking for, and aim to deliver a top-quality gameplay experience with every track. Members of the RockGamer Studios authoring team have shared the stage with world-famous artists such as Sting, Jethro Tull, Mötley Crüe and the B-52s. We know what it’s like to play in front of thousands of fans, and our mission is to recreate this adrenaline rush on the virtual stage, using the cinematic and lighting tools available to us. Most members of our authoring team have hundreds, if not thousands of hours of Rock Band playing experience. The team includes some of the most proficient “technical” Rock Band players in the world… as well as two members of The Gurn Killers, the reigning 2008 Rock Band national champions. What does this mean to you? Let’s just say we’re very passionate about what we do, and it shows in the quality of our work.

We are That Authoring Group, a charting company that charts songs for the Rock Band video game and for the game’s thousands of players. That Authoring Group allow bands and labels to have their songs downloadable for the Rock Band video game via The Rock Band Network.

If you have or know of a Rock Band authoring group that would like to be featured here, please get in touch with us here.

For more information, see this thread over at the RockBand.com forums.