Irie Tools - Irie Pascal for DOS is a Pascal compiler and interpreter. Both the compiler and interpreter are command-line based. OptiVec - Libraries for vector, matrix, and complex math functions. Hand optimized routines written in Assembler for speed and accuracy. CMATH - Assembler written complex number math library (single, double and extended precisions), intended as a high-quality replacement for the available C++ complex class libraries, and as an add on for Pascal or Delphi. UPX - The Ultimate Packer for eXecutables is a portable, extendable, high-performance executable packer for several different executable formats. Freeware. Ralf Brown's Interrupt List (USA Midwest mirror) - A list of interrupts used on the Intel x86 architecture and their meaning with over 9000 linked pages and 350 indexes greatly ease the process of searching. 386SWAT - A Protected Mode Debugger which provides debugging services to real mode, protected mode, virtual 8086 mode programs, DPMI and VCPI clients, and Win 3.1x and Win95/98 programs under any memory manager while occupying only a few kilobytes of low DOS memory.