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GlimmerBlocker is no longer maintained and should no longer be used as web sites have migrated from using plain http to using https (i.e. encrypted) which prohibits modification by a proxy unless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.
Fix crasher when activating/de-activating GlimmerBlocker on some OS X 10.11 (El Capitan) systems. Reported by Alex K.
Use CONNECT/SOCKS etc for CONNECT requets when a site-wide proxy has been specified. Reported by Adam J.
Minor fixes: Better log (in debug mode) when connect fails. Fix syntax bug in parser. Timeout for socket reads in CONNECT requests. Improved naming of threads Suppress "EXCEPTION WHILE USING CONNECTION" when Safari aborts connection while downloading file.
Version 1.6.6 was released 2015-09-17