For spreadsheets there is sc-im. For presentations in terminal there are termimad (in Rust)[3], mdp[4], and patat[5]. For files management vifm[6] is the best one, if you got used to Vim already.
And one more important thing - don't forget to setup true colors[7] in your terminal.
[1] https://repo.or.cz/elinks.git/shortlog
[2] https://github.com/andmarti1424/sc-im
[3] https://github.com/Canop/termimad
[4] https://github.com/visit1985/mdp
[5] https://github.com/jaspervdj/patat