SourceForge is still there, and all of my projects (including
libjpeg-turbo, one of TigerVNC's dependencies) still use it for hosting
official release binaries. I resisted the call to move to BinTray
because I prefer to deploy files via SCP or rsync, which SourceForge
allows. Its file release platform also allows for hosting arbitrary
directory structures, so I use it to host YUM repositories for my
projects. The company that was responsible for the "DevShare"
controversy hasn't owned SourceForge since 2016 (but I still make sure
to digitally sign all binaries that I host there, so users can verify
that they haven't been tampered with.) The technology behind
SourceForge is somewhat outdated, and its revenue model is ad-based,
which has the potential for sketchiness, but it still seems to have
significant momentum within the open source community.
Another option would be to set up your own S3 bucket. My projects use
that for hosting pre-release builds. Generally S3 will be free for a
year, then you'll be charged based on the actual amount of storage and
bandwidth you use. My bill usually amounts to US$0.15-$0.20 per month,
but I expect that it would be more if I were using it for official releases.