https://sonetel.com/ - Toll-free phone numbers.
https://discordapp.com/ - Alternative to Skype, no way to know its IP address.
https://www.vpnbook.com/ - Free VPH, PPTP protocol support and openvpn connection.
https://www.vpnkeys.com/ - Analogue of vpnbook.com / U.S. servers.
https://www.cekpr.com/decode-short-url/ - Shorts decoder (Google and others), IPLogger protection.
https://scryptmail.com/ - Anonymous mail, I advise you to refuse all others.
https://www.openmailbox.org/ - Analogue of scryptmail.com
https://tempmailo.com/ - Temporary mail, suitable for registration in dubious services.
https://archive.is/ - Archive, search for a safe copy or save it ourselves.
https://www.cachedpages.com/ - Cached websites/pages.
https://skyperesolver.net/ - SkypeResolver / IPLogger.
http://skypegrab.net/resolver.php - SkypeGrab / Selsin
http://www.vedbex.com/tools/iplogger - IPLogger
http://phoneradar.ru/phone/ - Validity check by cell phone number.