The macosxhints Rating:

[0 to 10 lights; 10 = perfect!]

• Developer/Download: PTH [Product Page]
  
• Price: Free!

A simple product that does one job very well. Configure a list of stock prices you'd like to track, and then watch them scroll across your menubar. You choose the font, width of the tracker, which fields to display, and how to use colors, and PTHStockTicker goes to work.

Simple, free, and featuring a great preferences interface, PTHStockTicker is one of those background tools I often forget I'm running until someone asks me what that thing in my menubar is...