GlimmerBlocker
HTTP based ad blocker for Mac OS X
No hacks, no instability
Upgrade Safari whenever you like, no need to wait for an upgraded hack
GlimmerBlocker is no longer maintained and should no longer be used as web sites have migrated from using plain http to using https (i.e. encrypted) which prohibits modification by a proxy unless you resort to install custom SSL certiticates on the client.
You should use a browser extension instead.
It was made as a hobby project during 2007-2008 by Peter Speck. It features both a custom http server and http client and a Mac OS X control panel.
GlimmerBlocker did not only block requests but also allowed for adding custom css and javascript to the pages. It also allowed for modification of the page html before the browser receives the html, which made some modifications much easier than DOM based modifications.
OBS: Works only on OS X 10.9 and 10.10 (Mavericks + Yosemite).
Now fully embeds java runtime so installation of old Apple java library is no longer required.
Detect application/smil as XML. Reported by Rasmus Bengtsson.
Use ISO-8859-1 when sending http headers to browser. Reported by Daniel Brauer.
Workaround for servers which sends space before colon in http headers. Reported by a contributor.
Smart quotes are now disabled in code editing.
Fix host header used for proxy requests as some client software doesn't use the wanted hostname in the host-header but only in the full URL. Reported by Thomas Tanner.
Version 1.6 was released 2015-01-01