What are some alternatives?
When comparing Slaps and trending.fm, you can also consider the following products
SameTunes - Music social network to compare, share, and discover music.
vdNote - Share noteworthy moments from YouTube videos.
BeatStars - BeatStars is a social music marketplace & distribution co.
Bookmark It - Create awesome notes on YouTube videos
Noted - Social music discovery
discoverlocal.fm - Find and listen to artists performing near you this week 🎶