Although not officially endorsed by the following companies - I am fairly brand loyal and have been using these products for years

Sennheiser: The are the only mics I have used for both live and recording applications for the last 15 years.  I also use their studio headphones.

Mogami: Only cables I use - period.

Roland: Only company that I use for keyboards/controllers.  I have also used several different iterations of their guitar synths over the the years.

Apple Mac(s) and Logic: Recent convert here - but I went all Mac/Logic for my DAW two years ago.

Universal Audio: Again, a recent convert here - but use their interfaces and mic preamps, which I am totally in love with!