I have been working on a machine learning project which detects malware. I have downloaded malicious files and tested my model and I was looking for a place which would contain about 50-60 non-malicious .EXE files.
You can search google by filetype, so if any of these filetypes are appropriate
You can use the filetype: operator in Google Search to limit results to a specific file type. For example, filetype:rtf galway will search for RTF files with the term "galway" in them.
Then just right-click on each result, to save locally. For 50 files, this is an easy way to get diverse file formats.
Just search for and copy all the .exe files from your C:\ drive to your sample data directory.
(My current C: partition has 3760 of them).
FFIEC.gov offers Home Disclosure Mortgage Act exes: HDMA exe files
Not 50-60, but a definitive, non-malicious start to building your dataset.
Description of exes: 'HMDA LAR & TS Raw Data Windows Application This software includes the loan-level data, documentation, and a tool to query and export the data.'