Midnight Update: Unfortunately due to Blizzard's addon philosophy changes, this addon is no longer functional and I don't expect to be able to fix it.

Enables customization of the buff & debuffs displayed on your unit frames, without sacrificing the ease of use that makes the default raid frames so appealing. Decide what buffs and debuffs you want to see, where you want to see them, and how big you want them to be.

One thing that sets Blobbo apart from similar addons is that you will not need to constantly add new buffs and debuffs as you adventure. Out of the box, Blobbo mimics the functionality of the stock raid frames - important class and encounter effects will show up automatically, no configuration required. No more having to configure important boss abilities to show up.

Features:

Move your buffs and debuffs on the unit frame.
Change the size and location of your icons.
Show or hide buffs and debuffs.
Single out important effects by moving them to their own section.

Setup:

All Blobbo settings are found in your addon options (Options > Addons > Blobbo)
To move all of your buffs or debuffs to a different blob, simply select "Blobs" and use the dropdowns to choose where to display them (or "None" to hide them entirely).
To change the size or location of icons, select a blob from the list and modify its properties.
To add/remove/modify how a specfic spell is displayed, select "Filters" and add a new buff by Name or Spell ID, then select it from the list.
Category determines where the buff appears. You can choose to include it with your other buffs or debuffs, or in its own custom blob.
The "Show" dropdown determines when the buff is shown (Always/Never/In Combat/Out Of Combat).
Check "Own Only" to only show a buff if you applied it.

Known Issues/limitations:

Built and tested with the stock Blizzard raid/party frames. I have no intention to expand this to work with any other unit frame addons (which typically have their own buff/debuff system anyways).
There are currently no mouseover tooltips for buffs and debuffs due to a technical limitation. I hope to look into this more but can't guarantee anything at this time.
Does not honor the "Display Power Bars" setting on the stock raid frames, so if this is enabled the buffs will overlap the power bar. I hope to add this soon, but for now it's simple to move your buffs up a few pixels to accomodate the power bar.

Blobbo - Unit Frame Buff & Debuff Customization