One thing I haven't seen mentioned yet is Consumer Reports. Consumer Reports is a membership-based non-profit that has been around since 1936. They are funded by membership dues, donations, and some corporate partnerships (mostly for research projects, I think). Their mission is to create unbiased reviews.
They do well reviewing large purchases like appliances. They also review consumer electronics and some software, though not in the highly technical way of a site like Tom's Hardware.
Anyway, Consumer Reports isn't perfect or entirely comprehensive, but the $40 per year membership pays for itself if you are a homeowner. Just in the last couple of months, they saved me $500 by directing me to a less expensive dishwasher than I otherwise would have bought.