Electric Drills: Hard to even find a cordless electric drill anymore. But I keep a corded Makita (they are green and sold by Lowe's) as a backup in my work vehicle all the time. They are excellent! Dewalt and Ryobi are very reliable cordless drills. A small 12 volt Ryobi is my favorite drill... lots of torc, light, and handly. I keep several cordless electric drills in my work vehicle. But the Ryobi gets the nod in most cases except for bigger jobs where I need the 18v Dewalt. It's heavy and wears on you after a while.
Reciprocating Saws: When I first started using these tools with regularity, I was shopping and a guy (a contractor by all appearances) suggested I get the Black & Decker saws. He said they all wear out.... well they do. BUT I wore out three Black & Decker saws on one job and will never buy another one. Replaced with a Makita and it worked for a couple years and eventually wore out. I now am using Dewalt reciprocating saws and they seem to be pretty reliable and last. Note... I use these saws hard. I have never owned a Millwauke brand saw, but that would be my second choice today. Lots of difference in quality on the blades... spend some time and buy good ones. Don't just buy the cheapest or what you see first believing they are all the same. They aren't by a long shot.
Skil Saw/Circular Saws: I use an older Porter Cable saw that I am quite fond of. I need to buy a larger one. I bought this one for "home" use with a middle sized blade thinking ... just big enough to handle 2x4's. It is great for small jobs but not continuous use like at a construction site. I have no experience with cordless skill saws although they are becoming more popular. If I were buying one today, I would get Dewalt brand.
Don't overlook Sears. They have some good stuff and an excellent store warranty. Porter Cable used to be a great high quality line but has declined since Black & Decker bought them out. I believe Porter Cable was to become Black & Decker's better line... not so sure of this, but they have a great name.
Jig Saws: I would say Bosch. But honestly, I have a Dremel brand and it's okay. Don't use it much.