There are a number of posts made available on this site covering a few of the most popular brands with a circular saw review.
Here is a breakdown of all the posts made so far:
DeWalt Circular Saws:
DeWalt DWE575 Circular Saw Review
How Does the DWE575SB Weigh Up Against Other DeWalt Saws?
Is The Bare-Tool DeWalt DC390B The Best Circular Saw To Buy? – A Review
How Does The DeWalt DW364 Circular Saw Stand Against The Competition?
Makita Circular Saws:
Makita 5477NB Circular Saw Review
Is The Makita 5007mg Circular Saw Making A Name For Itself?
Milwaukee Circular Saws:
Genuine Reviews of the Milwaukee 6390-21 Circular Saw From Genuine Users
Bosch CS5 Circular Saws:
Is The Bosch CS5 A Good Corded Circular Saw? – A Review
The Worxsaw WX429L Compact Circular Saw:
A look at a new compact circular saw.
BDCCS20-Black-And-Decker-Saw:
Is The Black and Decker BDCCS20 A Good Circular Saw?
Supporting Posts:
What You Should Know About Circular Saws
Top Circular Saw Resource Sites
Safety First When Using a Circular Saw