If you use TeX or any related system (latex, texinfo, cweb, metapost, etc.), please consider becoming a TUG (TeX User Group) member. They rely on membership and donations to keep going (and there are some tangible benefits to being a member, too).

(Disclosure: a friend who is active there told me they are not doing so well.)

https://tug.org/join.html

I joined. The journal is beautifully typeset. It has a the joyous, retro feel of the internet of a couple decades ago.

As always with TUG, the program promises lots of people doing cool things and people can view the talks for free.