OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
Website Grader - Grade your website's strengths and weaknesses in seconds.
strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
PageSpeed Ninja - One-click page speed boost for WordPress
X64dbg - X64dbg is a debugging software that can debug x64 and x32 applications.
WebSite Auditor - The techie's SEO spider: find site issues other tools miss