TrailerTrax is described as 'Exceptional music from award-winning composers & artists for film, video, media and advertising' and is an website in the Audio & Music category. There are more than 25 alternatives to TrailerTrax, not only websites but also apps for a variety of platforms, including Mac, Windows, iPad and iPhone. The best alternative is ccMixter, which is both free and Open Source. Other great sites and apps similar to TrailerTrax are eoun.com (Free), YouTube Audio Library (Free), AudioJungle (Paid) and Premiumbeat.com (Paid).
AudioJungle is part of Envato Market. At AudioJungle you can buy and sell royalty-free music and sound effects that are completely Podsafe for just a few dollars, which includes a Buyer Fee. The site is home to a bustling community of audio composers and producers.
Filmstro enables you to sculpt music in real-time by controlling the three, Momentum, Depth and Power of our themes. Easily create professional soundtracks that are both dynamic and bespoke in minutes. Powerful frame-by-frame editing using Filmstro's Graph Editor.
Stock Music Library providing high quality music for YouTube, Film, TV, Games and more. SongTrack Network is great value and offers one of the cheapest blanket licenses for exclusive production music. Similar to sites like Artlist or Music Bed.