ContentFly - Simple and reliable content ordering platform for busy marketers. Only pre-vetted writers from USA & Canada and 14-day money-back guarantee.
Invision - Prototyping and collaboration for design teams
brainFart - A feed of AI generated ideas from OpenAI's GPT2 and GPT3.Ideas for startups, apps and games.
Proto.io - Create fully-interactive high-fidelity prototypes in minutes that look and work exactly like your app should. Sign up for a free 15-day trial and get started.
AreYouInterested - A super-simple landing page builder for bulk idea validation
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.