Crawler and Data Extraction

Hello, we would like to develop or see a tag extract soft or script, we need to store those words into a database, we would like to see working examples and know how they work online, The data extracted have to be stored into a database (options) and files, be conectable with cms like joomla, and be able to make uses for SEF SEM SEO, also I would like to get a review from that software or script, and be able to modify the code afterwards. No Encyption txt log file, or csv, the best script demostration will win the proj