I2P

I2P (means Invisible Internet Project,^[3] though it is not commonly referred to by this name anymore) is a mixed-license free and open source project building an anonymous network (or, more accurately, a pseudonymous overlay network).

I2P

Developer(s)	I2P Team[1]
Initial release	2003; 22 years ago (2003)
Stable release	27 January 2016; 9 years ago (2016-01-27)[2] / July 31, 2015 (2015-07-31)
Repository	github.com/i2p/i2p.i2p
Written in	Java, C++
Operating system	Cross-platform, including: Microsoft Windows, Linux, macOS, OpenBSD, FreeBSD, Android
Type	Overlay network
License	Many: BSD licenses, GNU General Public License, MIT License, released into the public domain by the copyright holder
Website	https://geti2p.net

The network is a simple layer that applications can use to anonymously and securely send messages to each other. Possible uses include anonymous surfing, chatting, blogging and file transfers.