Web crawling, scraping, and spiders are all related to the process of extracting data from websites. Web crawling is the process of automatically gathering data from the internet, usually with the goal of building a database of information. This is often done by searching for links within web pages, and
TreeSheets is a free open-source data organizer. A "hierarchical spreadsheet" that is a great replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases. Suitable for any kind of data organization, such as todo lists, calendars, project management, brainstorming, organizing ideas, planning, requirements gathering, presentation of information, etc.