Ask HN: How do you organize your sales leads/prospects?

At our startup we're staring to get a few leads and it's getting a bit disorganized. Basically, we need a way to track the status of each lead. Have we called them? Did we schedule a follow-up call? Or did it go to voicemail? If so, when will we call them again? And which one of us is in charge of each lead?

I wanted to know what processes or software solutions other HN members have in place to help manage their phone calling and sales cycle. Thanks!