List of free data-collection stuff for developerππ½
If you're looking for all programming tools around data-collection (not just free). Check this page List of data-collection Programming Tools

SearchApi
SearchApi is a robust real-time SERP API delivering structured data from Google and other search engine results pages
Tag: scraping, data-collection, data-extraction, crawling, API
Free 100 successful API calls per month.

ZenRows
Web Scraping API & proxy server that bypasses any anti-bot solution while offering javascript rendering, rotating proxies, and geotargeting.
Tag: scraping, data-collection, data-extraction, crawling
Scrape any website up to a 1000 requests