Treo - Treo is the page speed monitoring tool that helps your customers from obtaining a faster web experience.
OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
perf - Perf is a simple app monitoring solution paired with meaningful alerts.
strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
X64dbg - X64dbg is a debugging software that can debug x64 and x32 applications.