Proxy servers serves as an electronic middlemen or intermediary to handle requests from a client, asking for resources or some other information from another server.
The problem with other ad-blockers for Safari is that they are implemented as awful hacks: as an InputManager and/or ApplicationEnhancer. This compromises the stability of Safari and very often create problems when Apple releases a new version of Safari.
GlimmerBlocker is implemented as an http proxy, so the stability of Safari isn't compromised because it doesn't use any hacks. It is even compatible with all other browsers.
Tor is free software and an open network that helps you defend against a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security known as traffic analysis.
A searchable database of user-agents as used by browsers, search-engines spiders and crawlers, web-directories, download managers, link checkers, proxy servers, web filtering tools, harvesters, spambots, badbots. Sorted by the user-agents names with informations about their type, purpose and origin. The info-field at every user-agents entry offers even more information