Apps with 'Usenet Community' feature

Spotnet is a usenet client that utilizes a peer-to-peer indexing method where users "spot" content on usenet, notifying other clients that the content is there and available.

FTD is a software client and community built around Usenet. Volunteers identify content uploaded on Usenet then submit a pointer or "spot" of the spotted content to the FTD index where all FTD users can easily browse through available content.