Zamzar - Free conversion online of many type of documents (images, text, video, audio...
Site Rank Data - View historical rank information of websites via time series charts.
iLovePDF - Free online PDF tool set
Q-Stats - Get free marketing insights for every question on Quora.
Convertize - Convertize Empowers Marketing and Product Teams to create Persuasive Customer Experience. Increase Engagement with Nudges. AB Test any content, Effortlessly
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.