Our latest lightweight application which downloads historical stock data from Yahoo Finance has been made available on GitHub as an open source project.

Feel free to download, share or build up on it:
https://github.com/TeamBrookvale/TBYahooFinanceDownloader

If you are not a coder then you can download and run the data downloader now:
https://github.com/TeamBrookvale/TBYahooFinanceDownloader/releases/download/0.0.1/TBYahooFinanceDownloader.0.0.1.exe