I recently came across a tool called “Sketch”, which is great for designing apps and other responsive layouts, and has great resources as well. For now, it’s only available for Mac though. What would be a valid alternative on Windows?
Some other valid options for 2017:
This is a very young product and as such it’s still lacking many features, but for now it’s a good vector editor, and the roadmap promises a lot more: symbols,
sketch import, prototyping, etc. It’s great advantage as of now, is that it’s free! It’s available for Mac, windows, linux, and even online.
Edit: As of version 3.1 gravit imports sketch files, which makes it an even better alternative.
This is not an app made exclusively for web design, which can be both an advantage and disadvantage, but with vector AND raster editing features, symbols resizing, and the best export interface I’ve ever seen, this is a super strong contender for all-around design app. Available for Mac & Windows