What are some alternatives?
When comparing Adblock Fast and Crystal, you can also consider the following products
Adblock Plus - AdBlock Plus is a browser extension for Firefox, Chrome, Opera, and several other popular browsers that prevents intrusive ads like pop-ups and malicious code from appearing on websites you visit.
Go.CD - Open source continuous delivery tool allows for advanced workflow modeling and dependencies management.
Ghostery - Privacy tool for transparency and control
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
StopAd PRO - The ultimate ad blocker for Windows and Mac.