Send Large Files
Transfernow
Free for up to 4GB
https://www.transfernow.net/en/
WeSendIt
Free for up to 5GB
https://www.wesendit.com/
SendSpace
Free for 300MB
https://www.sendspace.com/
WeTrasnfer
Free for 2GB
https://www.wetransfer.com/
Security Services
Have I been pwned
Check if email had been breached
https://haveibeenpwned.com/
RBLMon
Free RBL Black List monitor and alert service, up to 3 IP addresses.
http://www.rblmon.com/