This is an addon that organizes player buffs. The main feature of the addon is that buffs tend to stay put. Just because buffs are added or canceled is no reason for other uninvolved buffs to continually be jumbling all around. The addon does not replace the Blizzard buff frame. It simply changes the ordering of the buff icons.

Did you ever wish that your player buffs in the upper right corner of your screen could be tamed a bit so that they didn't jump all around as buffs were added or removed? Have you ever tried to cancel a buff by right-clicking it just to have another buff jump in and take its place at the last second? Do you like the Blizzard buff frame just fine but wish the buffs weren't so flighty? This may be the addon for you.

As a secondary nicety, the addon also organizes buffs into 5 rows of 16 buffs each based upon duration (total duration, not time remaining) and caster. The default Blizzard organization is 4 rows of 8 buffs each, so, yes, this addon can allow you to see more buffs than the default UI. Starting from the top, the rows are
1. Buffs of unspecified duration
2. Buffs with 30 minutes <= duration
3. Buffs with 1 minute <= duration < 30 minutes
4. Buffs cast by others with duration < 1 minute
5. Buffs cast by you with duration < 1 minute

There is no configuration, so just install and start buffing!