We created a tool used in niche fixed income asset-backed securities (which are heavily engineered). We crawl EDGAR for ABS-EE filings which are posted in XML,

We created a tool used in niche fixed income asset-backed securities (which are heavily engineered). We crawl EDGAR for ABS-EE filings which are posted in XML, clean and standardize them, drop them into a data base and then allow users to create instant stratifications of the portfolio (rather than having to download the 80k row loan file and run pivot tables). This allows someone buying the B tranche of FORDO 2017-B to see how many people in Florida are 30-60 days delinquent, what model car they drive, the LTV, etc. 100% free: https://finsight.com/product/us/abs/ee https://finsight.com/product/us/abs/ee Note: this is not exactly a "hobby" but we offer all of these services 100% for free without restriction so thought I would share regardless.