Below I will list some of our favourite tennis brands and ones that I use and recommend on a daily basis.
I love tournaments grips, I've been using them all my life and they always provide great grip especially as your hands become sweaty and your playing in humid conditions. I've tried all the grips out there and always go back to Tourna. The blue dry version are my favourite as I feel they provide the best grip.
I've had the opportunity over the past number of months to test the RS line of products and I was extremely impressed with their strings. They have a PARIS and a Lyon string which I both like. I used them both in the 1.26(17) size. I had a preference with the Paris string and will be testing it for the long term. I found it great for my shoulder as it helped reduced previous shoulder pain that I got with some other strings and the I thought the feel was amazing. The strings are available from your local tennis warehouse store.