I've been using Dr Dennis Gross Retinol + Ferulic Acid Brightening serum. It's not cheap but it doesn't make my sensitive skin react and I can see a difference after only a week. It has great reviews online for brightening your complexion and fading dark spots/pigmentation. My skin definitely looks brighter and I think my freckles look a little lighter and my skin is more even. I'll update in a month or 2! But so far, I love this.
I've also been doing oil cleansing for the past few weeks and ditched regular cleansers. I think it's made my t-zone less oily during the day and my skin is very soft and moisturised. I use sweet almond oil with a little bit of castor oil mixed in sometimes.
Also really liking Shiseido Sun Protection Lotion. I'm using the SPF 30 but if I'd known there was an SPF 50 I would have gotten that. It seems to give great protection though, and it's the least greasy facial sunscreen I've ever tried. The texture is very milky and a little drop spreads far, it dries quickly and doesn't leave much of a greasy feeling. I wore make-up over the top of this and had no problems, less than I used to with regular moisturiser.