The best alternatives to Sketch are CloudHQ, ChalkMotion, and Iceberger. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Sketch?
Agree.com— Free e-signature for everyone with invoicing and payments!
cloudHQ offers real-time data protection and backups of all your data in the cloud.
More than 60 productivity apps:
- Label and email sharing and collaboration
- Track your emails with Free Email Tracker
- 100% free email templates for Gmail
- Export emails to PDF and Google Sheets
MapBoard is a online map with whiteboard doodling tools and as many users as you want! It updates in real time, and is a great way to share and collaborate on ideas that have a location. Currently in alpha :)