There are myriad resources to get data from a variety of domains (insurance, population, health, geography, weather, sports, etc.). You can get the data in .csv form or through API calls.
Here are a few to jump-start your data-oriented application:
Financial: https://fred.stlouisfed.org/search?st=csv
Baseball: http://www.baseball-databank.org/
Soccer: https://www.soccer24.com/team/apia-tigers/84SKUunL/
Government: https://www.data.gov/
Public: https://github.com/awesomedata/awesome-public-datasets
GIS: https://gisgeography.com/best-free-gis-data-sources-raster-vector/
Google Maps API: https://developers.google.com/maps/documentation/directions/
Reference: https://www.quora.com/What-is-the-best-financial-data-source-in-CSV-file-format
Here are a few to jump-start your data-oriented application:
Financial: https://fred.stlouisfed.org/search?st=csv
Baseball: http://www.baseball-databank.org/
Soccer: https://www.soccer24.com/team/apia-tigers/84SKUunL/
Government: https://www.data.gov/
Public: https://github.com/awesomedata/awesome-public-datasets
GIS: https://gisgeography.com/best-free-gis-data-sources-raster-vector/
Google Maps API: https://developers.google.com/maps/documentation/directions/
Reference: https://www.quora.com/What-is-the-best-financial-data-source-in-CSV-file-format