Mentia - See what content will work best for you on social media
Zest.is - Share and discover stellar marketing content
Juice by Paper.li - Share stories your followers will love (iOS)
uberflip - Organize and Centralize ALL of your Content in minutes
Value on board - Valueonboard helps you find your value proposition going through the whole problem-solution fit phase
Designfeed - Create gorgeously rendered visual content for social media