UXPin is a collaborative design platform, allowing entire teams to participate in the design process from start to finish.

Fluid UI is a browser-based wireframing and prototyping tool developed by Fluid Software and used to design mobile touch interfaces.

Mockup Designer is an online mockup creator.

Antetype is a design and layout software focused on visual design. It saves you a lot of time creating and optimizing UIs.

MockFlow is a collection of wireframe tools, prototyping tools, UI mockups, UX suite.

Pidoco is a cloud-based collaboration software.