Web Page Analyzer - free website speed test website optimization tool check website performance report webpage speed tool download speed test
from Diigo
Pingdom Tools
Pingdom Tools
Load Impact - Free web site load test
WebPagetest - Website Performance and Optimization Test
GTmetrix | Website Speed and Performance Optimization
The Cost of Banner Advertising on Web Performance - internet advertising slows web page downloads
Website & Performance Monitoring | Pingdom
Hosting Providers sites ordered by failures