#Nitter is an AGPLv3 licensed #Twitter frontend with all the features of the default site -- but more importantly -- it returns all of the freedom that Twitter's nonfree JavaScript takes away from you. Try out one of the instances at https://nitter.net
@fsf There's also a browser addon called LibRedirect (https://github.com/libredirect/libredirect) that automatically redirects you to a random nitter instance when you open a twitter link. This also works for other sites like Reddit to Libreddit or YouTube to Invidious/Piped.
There's also Privacy Redirect (https://github.com/SimonBrazell/privacy-redirect), which does basically the same thing but has a lot less features. I use that on Iceraven because I can't download LibRedirect there.