It's on the website. https://geti2p.net/en/comparison/freenet
I think they answer this better than I can.
I2P Community Edition
This isn't the official I2P channel, if you want go there then you can find it in the links below.
Rules
"Don't be a dick" - Wil Wheaton
General
I2P Forum (clearnet) Official I2P community and development forum
zzz zzz's personal website, old developers forum
planet.i2p RSS aggregator
Media:
File Hosting and Pastebins
FS Filesharing service
Cake Pastebin short term filesharing and pastebin
PrivateBin Encrypted pastebin
IDK's CowYo pastebin, Mirror (Requires JS)
Torrents
PaTracker Main torrent tracker
Chudo's Torrents (French) torrent tracker
Social Networks and Microblogging
Exploring I2P
I2P Name Registries
reg.i2p operated by PurpleI2P Team
isitup.i2p Another I2P Name Registry and checking tools to see if a eepsite is offline.
Search engines
IRC
Irc2P comes pre-configured with I2P. To connect with other networks, please follow this tutorial.
Syndie
An open source system for operating distributed forums in anonymous networks
Syndie Project Syndie Project Website
syndie.darrob.i2p
syndie.echelon.i2p
syndie.inscrutable.i2p
syndie.killyourtv.i2p
syndie.meeh.i2p
syndie.welterde.i2p
Inproxies
You can use inproxies to surf the I2P network without having to have an I2P router.
i2phides.me / i2p.mk16.de (i2p-inproxy.mk16.de)
onion.ly
Follow us on Twitter
It's on the website. https://geti2p.net/en/comparison/freenet
I think they answer this better than I can.