The hydrus network client is an application written for Anon and other internet-fluent media nerds who have large image/swf/webm collections. It browses with tags instead of folders, a little like a booru on your desktop. Advanced users can share tags and files anonymously through custom servers that any user may run. Everything is free, privacy is the first concern, and the source code is included with the release. Releases are available for Windows, Linux, and macOS.
I am continually working on the software and try to put out a new release every Wednesday by 8pm EST.
This github repository is currently a weekly sync with my home dev environment, where I work on hydrus by myself. Feel free to fork, but please do not make pull requests. I am also not active on Github, so if you have feedback of any sort, please email me, post on my 8kun or Endchan boards, or message me on tumblr or twitter or the discord.
The client can do quite a lot! Please check out the help inside the release or here, which includes a comprehensive getting started guide.
I use a number of the Silk Icons by Mark James at famfamfam.com.