I brought Avon's Ideal Flawless Matte Mousse Foundation home from an event a fair old while ago, and it's quietly worked its way into my heart since. I'd never tried one of the mousse format foundations which have become popular recently, and I'm finding myself really liking the texture - it's soft and light, and blends over the skin with a velvety smoothness which leaves the skin looking flawless and softly matte.
An unexpected benefit is that the texture makes the product very travel friendly - as it's an almost-solid product which warms and softens on the fingers, rather than a liquid, it's much less likely to spill all over you makeup bag during transportation.
This recent FOTD shows the finish - it's matte, but not chalky or unnatural, but rather soft and light-diffusing. Lovely.
Find it at Avon's website, where it costs a very reasonable £10.
Disclosure: PR sample