libcraigscrape is an easy library to do the heavy lifting between you and Craigslist's posting database. Given a URL, libcraigscrape will follow links, scrape fields, and deduce Ruby objects out of the raw HTML from Craigslist's servers. libcraigscrape was primarily developed to support the included craigwatch script.
jobSeeker is a class that searches for jobs on a range of different job sites. It takes a list of parameters for searching for jobs, such as keywords, country, city, distance limit, and the sites to search. It returns an array of results that includes the job title, description, and job page URL. Currently it supports Craigslist, Indeed, and Monster.