SDK
freenet.support.CPUInformation
net.i2p
net.i2p.addressbook
net.i2p.client: Implements the base I2P SDK for developing applications that communicate through I2P.
net.i2p.client.datagram: Provides a standard way for reading and writing messages transferred over I2P so that the recipient has an authenticated mechanism to reply to it.
net.i2p.client.naming: Provides a standard way for querying the local naming service to resolve a name into a `Destination` (without the complexity of JNDI).
net.i2p.crypto
net.i2p.data: These classes define the common data structures used by the various I2P protocols.
net.i2p.data.i2cp: The Invisible Internet Client Protocol (I2CP) allows applications simplified access to the I2P network without requiring them to deal with the issues involved with the Invisible Internet Network Protocol (I2NP).
net.i2p.stat: These classes define the statistics package used extensively throughout the I2P router - both for adaptive operation of the router and for debugging.
net.i2p.time
net.i2p.util: These classes define the several useful utilities used throughout the router and applications.

Streaming
net.i2p.client.streaming: Implements a TCP-like (reliable, authenticated, in order) set of sockets for communicating over the IP-like (unreliable, unauthenticated, unordered) I2P messages.

BOB
net.i2p.BOB: BOB, the Basic Open Bridge, allows TCP applications to talk over I2P.

SAM
net.i2p.sam
net.i2p.sam.client

RouterConsole
net.i2p.router.web

Router
net.i2p.data.i2np: The Invisible Internet Network Protocol (I2NP) is only a part of how an application can send messages over the network.
net.i2p.router
net.i2p.router.client
net.i2p.router.message
net.i2p.router.networkdb
net.i2p.router.networkdb.kademlia
net.i2p.router.networkdb.reseed
net.i2p.router.peermanager
net.i2p.router.startup
net.i2p.router.transport
net.i2p.router.transport.ntcp
net.i2p.router.transport.udp
net.i2p.router.tunnel
net.i2p.router.tunnel.pool

Systray
net.i2p.apps.systray

I2PTunnel
net.i2p.i2ptunnel
net.i2p.i2ptunnel.socks
net.i2p.i2ptunnel.streamr
net.i2p.i2ptunnel.udp
net.i2p.i2ptunnel.udpTunnel
net.i2p.i2ptunnel.web

Other Packages
com.nettgryppa.security
gnu.crypto.hash
gnu.crypto.prng
gnu.gettext
org.bouncycastle.crypto
org.bouncycastle.crypto.digests
org.bouncycastle.crypto.macs
org.cybergarage.http
org.cybergarage.net
org.cybergarage.soap
org.cybergarage.upnp
org.cybergarage.upnp.control
org.cybergarage.upnp.device
org.cybergarage.upnp.event
org.cybergarage.upnp.ssdp
org.cybergarage.upnp.xml
org.cybergarage.util
org.cybergarage.xml
org.cybergarage.xml.parser
org.freenetproject
org.klomp.snark
org.klomp.snark.bencode
org.klomp.snark.web
org.xlattice.crypto.filters