Name Website: InvoiceSherpa;
Be Visionare is a fantastic example of flat web design with detailed, but not distracting, illustrations.
Moire Studios is a thriving website and graphic design studio based in Jakarta, Indonesia.
Personal website by Vincent Tantardini, via Behance. I like the typography and good use of type weight.
Use this lovely UI kit to design your own application or website. The PSD file includes different UI elements build with fully scalable vector shapes.