Encipher.it - Encrypting email with Encipher.it is a simple way to protect your sensitive data.
Toolsley PGPigeon - Simple but powerful OpenPGP-compatible message encryption webapp.
Gofile.io - You can upload your files without registration, There are no limits.
GPGTools - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
Temp.PM - Temp.PM - Temporary Private Message
Lockbin - Lockbin is a web application for sending private email messages and files.