Iman Second to None Stick Foundation in Clay 1: By far the most perfect match ever. Iman's website compares their NC45 to a Clay 3 which is very RED. The Clay 1 is definitely a good match for NC44s.
Bobbi Brown Stick Foundation compact in 5.5 Warm Honey: Great match as well but needs to be buffed in and bronzed up for it to look natural
Images from Google
Bobbi Brown Oil Free Cream Foundation 6 Golden: A bit 'orange' but blends in well. Does not oxidize so I can see me using this when I get a bit tanned in the summer. This would be perfect for true NC45s though.
I must say that I'm loving Iman's products and placed an order for her cream to powder compact, luxery liquid foundation in Clay 1 and her blot powder in Medium Deep. I also ordered her cover cream (concealer) in Sand medium to use ah an under-eye highlight so pictures and swatches will follow along with reviews on all her products! I can tell you now that I have lots of good things to say :)