Im disagree with the opinions here. YOU DONT NEED RENOISE FOR MAKE CHIPMUSIC!!!
I would bet for simple trackers. Renoise have tons of pro features that you will never use.
Ok, people will reply me saying: "but with renoise you can make chiptunes too"
Yes.. agree... but again.. you will be use only the very basic features that you can get in other trackers for free.. ( so not need to pay)