iMediaServer 1.0.19 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application is included in Audio & Video Tools. We recommend checking the downloaded files with any free antivirus. This Mac application is an intellectual property of AlanSmith.
From the developer:
iMediaServer is a standard UPnP (Universal Plug and Play) AV (Audio/Video) media server which automatically recognizes UPnP devices within a network.
Using iMediaServer you can share media files (audio, picture, and video files). This means that all users in the local network have access to the files. Players that are compatible with the UPnP standard can use, play and display shared media files.
You may want to check out more Mac applications, such as Tune Buddy, RadioRec or MyFreeTV, which might be similar to iMediaServer.