The flat design trend affected the logo designs as well as the user interfaces in web design.
Flat design is taking world by storm since Microsoft introduced Windows Phone and Windows 8. It influenced not only web design, but various types of interfaces and logos too. Lately, a lot of huge corporations, such as Google and Bing are adopting their logos into flat design principles.
According to flat logo design concept, images should be designed simple, remarkable, and beautiful to fit in the whole branding style of the product. In flat design the main attention goes to typography, minimalistic elements by leaving out complex gradients, shadows, bevels, feathered effects or 3D appearances. Flat design is all about tiny details for elements, typography and shapes so they become simple and easy to remember.
These flat logo designs can be inspirational for designers.
It seems that flat logo designs will be popular for a long time.