BEYE (Binary EYE) is a free, portable, advanced file viewer with built-in editor for binary, hexadecimal and disassembler modes. It contains a highlight AVR/Java/i86-AMD64/ARM-XScale/PPC-64 and other disassembler, full preview of MZ,NE,PE,ELF and other.
Hammerhead is a web site coverage, HTTP load generator, HTTP benchmarking, and stress testing tool. It has been designed to emulate multiple users from multiple IP addresses at maximum speed (unlike it's interpreted counterparts).