The Jesco Special is an addon designed for WOTLK Classic. It will track buffs that are placed on the player by self or others and will track debuffs the player places on their targets. Works for Retail and WOTLK. Vanilla classic only partially works, just due to how the api is different.

Here's a video showcasing the addon in action. https://youtu.be/5oF4dFU6QaE