Versionista is described as 'online service that alerts you when a Web site changes. It shows you what's been added & removed to any Web page. It records a full page screenshot, and lets you use powerful inclusion/exclusion filters' and is a Website Monitor in the OS & Utilities category. There are more than 25 alternatives to Versionista, not only websites but also apps for a variety of platforms, including Windows, Mac, Firefox and Linux. The best alternative is Distill Web Monitor, which is free. Other great sites and apps similar to Versionista are Update Scanner (Free, Open Source), Visualping (Freemium), FiveFilters Feed Creator (Freemium) and Feedfry (Freemium).
Distill is a web monitoring tool. It can monitor RSS feeds, a webpage or a part of webpage. Alerts in the form of pop-up, audio or emails can be received. Featured highlights: • Content selection from any webpage including iframes.
Monitor webpages: Get Newsfeeds from web pages that do not deliver RSS Customization: Monitor portions of webpages via CSS selectors / ignore Ads and Social Media Elements Handling: Manage your monitorings. Get them via RSS or e-Mail
urlwatch is intended to help you watch changes in webpages and get notified (via e-mail, in your terminal or through various third party services) of any changes. The change notification will include the URL that has changed and a unified diff of what has changed.