Adobe XD is a tool that eases the creation of user experiences for the web and mobile applications. It is a single app, coming with a solid set of features, to design, prototype and share. It is built to facilitate the work of today's UX designers.
Sketch.The.Ripper shows the contents of any .sketch file: artboards, symbols, and text.
It's useful for HTML coding. Unlike complicated tools like Zeplin, Avocode, and Lunacy, it rips the files quickly, showing all the context that it finds useful. And it's completely free.
Example of a ripped file: http://bit.ly/sketch-the-ripper-sample
Kactus is an app to unlock true version control for your design without changing your existing tools. It takes advantage of the new sketch file format and transforms them into a format that git can understand. By doing so, we can close the gap between designers and developers by using a common platform: Github.
Maze is a tool for designers and developers that gives analytical results with actionable KPIs for your Invision prototypes.