Watering Systems:
I have rather a lot of birds (cough, cough), so I bought some of the Little Giant Automatic Poultry Founts for my big coops.
http://www.ebay.com/itm/330817563401?hlp=false&var=
The fount comes in different sizes and there is also a shallow flat version for chicks. The one issue I had was that they leaked a lot at first, but I solved that by replacing the interior valve with reclaimed tire valves I got for free from the local tire shop (the manufacturer's website is sucky, but I found answers here at BYC). The fount is easy to remove for cleaning -- yes, you do need to clean them regularly, but that is way easier than cleaning any other waterer I've tried.
I found the founts work great for chickens and turkeys, but aren't so hot for ducks. The larger size can be adjusted to make the water deep enough for ducks, but then of course it gets very dirty. I still haven't cracked the nut on duck water.
I had to install water lines from the garden hose spigot to the coops. I knew zip about plumbing before I started, but decided to work with Pex pipe because it is flexible and comes in rolls. I ran a main line to the coop shed, then put in splitters to the coops. There is a shut off valve after each split. I ran the water line clear through the coop and out the back wall into the pasture/run. I put a hose bib shut off valve at the ends of the line so I can flush the lines and also so I can attach a garden hose out back if I want.
It wasn't a tough project except for the learning curve. They even sell "snap on" fittings for pex pipe.
Obviously this system isn't going to be much good during cold snaps, but I can drain the lines and use the hanging waterers for the few frozen days we get each year.