Google for Spreadsheets
While reading the article googling up passwords I noticed one of the examples given was a google search for budget spreadsheets.
Here’s the syntax used to search google for Excel Spreadsheets:
search query filetype:xls
Simply append filetype:xls to the end of any google query and you’re returned .xls files.
Note: I’d personally inspect any code before “enabling macros”.
A few example queries for spreadsheets:
Budget
Gantt Chart
Solver