Downloading GNUnet 0.10.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The most popular version among the program users is 0.1.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this free Mac application is SourceForge Editorial Staff. The program is included in Internet & Network Tools.
From the developer:
GNUnet is a framework for secure peer-to-peer networking that does not use any centralized or otherwise trusted services. Peers in GNUnet monitor each others behavior with respect to resource usage; peers that contribute to the network are rewarded with better service.
You may want to check out more Mac applications, such as AbleFtp7 or Hotline, which might be related to GNUnet.
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