"Otr.to - p2p chat, that mean you communicate directly, no logs saved on server
Otr.to absolutely anonymous, registration free
Otr.to browser based, that mean you don't need to install or ask somebody to install software
Otr.to use OTR (Off-the-Record Messaging) - most secure cryptographic protocol
Otr.to Open-source and written in JavaScript, that mean you can check how it works"
I2P is an anonymous overlay network - a network within a network. It is intended to protect communication from dragnet surveillance and monitoring by third parties such as ISPs.
Freepto is a Linux-based operating system on USB stick. This means you can bring it with you and use any computer as it was your own. Also, data you save on the USB stick will always automatically be encrypted (i.e. nobody else will be able to access them).