What is eDonkey2000 ?
The eDonkey2000 P2P application was the pioneer behind the ED2K network, but has lost its dominance to the eMule client. Originally it was the only client for the network and proprietary to boot, displaying ads to the users, which could only be disabled by buying a license.
An official replacement had also appeared, by the name of Overnet, a P2P network which more decentralized than the server-based ED2K network. The eMule community has begun a similar project by the name of Kademlia, probably in response to the Overnet client.
The eDonkey2000 website was shut down 2006 after a RIAA lawsuit and shows a RIAA banner since. There have been no more updates and eDonkey2000 is not in use anymore.