AnyMailFinder.com - Find anyone's email address

DataWalk - DataWalk is a software platform to connect numerous large data sets, both external and internal, into a single repository for fast visual analysis.

Extract Emails - Extract Email makes it so easy to create email mailing lists, catalogue contact information, and enjoy cross-platform accessibility.

Lampyre - Lampyre - an efficient data analysis and OSINT multi-tool for everyone.

GitHub Email Finder - Find the email of any GitHub Developer using their GitHub username.

Maltego - Maltego is an open source intelligence and forensics application.