holehe allows you to check if the mail is used on different sites like twitter, instagram and will retrieve information on sites with the forgotten password function.
Querytool is an OSINT framework based on Google Spreadsheets. With this tool you can perform complex search of terms, people, email addresses, files and many more.
DaProfiler allows you to create a profile on your target based in France only. The particularity of this program is its ability to find the e-mail addresses your target.
Totem allows you to retrieve information about ads of a facebook page , we can retrieve the number of people targeted, how much the ad cost and a lot of other information.
This is an Open source intelligence tool and used to gather information about social media and it is also used to find whether the user name found in any of the website.It is used to find GPS location of an image and it also checks whether the email is found or not.