I took the lazy way out, I installed and moisture filter and self oiler in-line. I then put a 3-way nipple outlet after that. I can use up to three tools at once, just lay one down and pick up the one I need. I have to bleed the water out of the water filter about once a week, but I have to do that on the main tank as well, so I just do them both at the same time.
Today I used the brad nailer, the stapler, and the framing nailer, all hooked up at the same time. Other times I can use the torque wrench and tire inflator or several other tool combinations at the same time.
The filter/oiler cost about $14 from Harbor Freight. The Framing nailer I got for $69, and the brad nailer and stapler were both less than $20. The most expensive parts were the compressor, the torque wrench set w/die grinder, and the paint sprayer kit.