Denatured Alcohol or Methyl Alcohol. Dissinfects and because it's an alcohol, you don't have to worry about rusting your tools. Maybe not as economical as the bleach/water mix, but it's a sacrifice that I'm willing to make to not rust my stuff.
Spray 'Brake Cleaner' works amazing for cleaning your saws and pruners. It will peel the sap residue right off of the surfaces. Just don't spray on any painted surfaces!