Joining Track Spark's 1 month free trial this month gets you a bunch of goodies including:
- Slam Dawg by Beatskillz.
- Extremum by Sinevibes.
- Dancida by Cubic Audio.
- Acoustic guitar, bass & drum loops.
- "Use your loops & samples as inspiration" tutorial by Rich Lewis.
All that for free and then $2.99/mo but you can cancel at any time.