Part of building the Alt-Net involves leveraging the available tools and services on the Legacy Internet. This includes online tools, downloadable freeware and downloadable "freeware". This thread is a repository of various freely available tools & services both online and offline. Once I get enough content in this thread I'll make a tagged database of them.

Speaking of tagging, here's a couple relevant tools

https://booru.org/create
https://hydrusnetwork.github.io/hydrus/

And some more examples of what I mean by tools and services:

Screen Scrapers / Downloaders

https://youtube-dl.org/
https://chrome.google.com/webstore/detail/image-downloader/cnpniohnfphhjihaiiggeabnkjhpaldj
https://www.parsehub.com/
https://anything2mp3.cc/

Encryption