NCSA Mosaic? That young trendy upcoming stuff? Where Viola was so much better since it had typed links and made available something like HyperCard outside a Mac environment? :-) :-)
While we're reminiscencing... I started to work on free software in 1982 -- on TeX actually, and I still work on it ;-) -- and we sent tapes around. Anybody still remembers DECUS, the DEC Users Group? Their tapes were very important.
Later we got Bitnet and were able to access ftp servers by email. (A Google search for my Bitnet address XITIJSCH@DDATHD21 still finds 314 results, after more than 2 decades.) Usenet via uucp gave us the ability to participate in real discussions, at the same time. Real Internet (TCP/IP) connectivity actually came quite late, and the World Wide Web came even later.