Q-Stats - Get free marketing insights for every question on Quora.
#buildinpublic - Discover what people are building in public
Site Rank Data - View historical rank information of websites via time series charts.
Open Makers - Open Makers is a community for those of you who are "building in public" and want to share your maker journey.
Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more
Astramind for Makers - Astramind is a platform where makers build in public and engage with potential customers, fellow makers.