GlimmerBlocker For Mac Publisher's description
from Vitality ApS
The problem with other ad-blockers for Safari
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. Snow Leopard doesn't support the InputManager-based blockers when Safari runs in 64-bit mode.
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 and other native Mac OS X applications which uses http, e.g. NetNewsWire.
You'll always be able to upgrade Safari without breaking GlimmerBlocker (or waiting for a new release); and you'll be able to upgrade GlimmerBlocker without upgrading Safari. This makes it much easier to use the beta versions of Safari and especially the nightly builds of WebKit.
What's New in This Release:* Fixed bug: 'request' rules are now recorded in history tab. Reported by Uwe Gansert
System Requirements:PPC / Intel, Mac OS X 10.5 or later.
Program Release Status: Minor Update
Program Install Support: Install and Uninstall