FOSS equivalents of *OLD* database and spreadsheet tools?

[Richard Owlett <rowlett@cloud85.net>]

Back in 70's/80's I wrote programs as part of routine job duties.
  {8080/8085 assembler, dBase and Paradox}
Neither I, nor my employers, classed me as a "programmer".
I was "Senior Engineering Tech" or "Junior Engineer".
IOW, I was not in abject *AWE* of computers. *ROFL*

Right now I'm working on a personal project.
INPUT:	How much of what did I eat?
OUTPUT:	How much [cal/protein/fiber] did I eat?

SQL {and variants} seen to dominate all else.
IIRC, dBase was simpler.

What current FOSS system might I be comfortable with?

TIA