Fade
The Beat Strangler
I've always liked Ozone, it's really good just from the presets alone. If you're not a mixmaster and need some help, Ozone is a great choice.
http://www.prosoundweb.com/article/izotope_releases_ozone_6_creative_mastering_platform_video/
http://www.prosoundweb.com/article/izotope_releases_ozone_6_creative_mastering_platform_video/