The best replacement for studio 2013 is mixr.

The best alternatives to studio 2013 are rated as following:
★★★★★  mixr
★★★★  bose qc15
★★★  solo hd
★★★  eclipse
★★  beats wireless

Your alternative for studio 2013 is not listed? Suggest!
Speaking about studio 2013, one probably shouldn't forget about msdn.

Other search terms related to studio 2013 and their ratings are:
★★★★★ msdn
★★★★ blend
★★ git
You have in mind a companion for studio 2013 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of studio 2013 in all years. Click on graph for more.
studio 2013
mixr
bose qc15