Budgeting can be a stressful, challenging and uncomfortable experience. While it's completely possible to do it on your own, we've become fans of a few great budgeting apps. Take our favorite budgeting app Quicken, which is having a 50 percent off sale for Black Friday. The Quicken Simplifi app is down to $3 monthly from $6 monthly, adding up to $36 for the year. Quicken Classic, the company's "original desktop software" for "experienced investors" is also half off at $6 monthly, down from $12 monthly. The sale starts today and is available until Wednesday, December 3. One of the…