OllyDbg 2.01 Alpha 4 Free download

OllyDbg is a 32-bit assembler level analysing debugger for Microsoft® Windows®. Emphasis on binary code analysis makes it particularly useful in cases where source is unavailable. OllyDbg is a shareware, but you can download and use it for free. Special highlights are: * Intuitive user interface, no cryptical commands * Code analysis - traces registers, recognizes procedures, loops, API calls, switches, tables, constants and strings * Directly loads and debugs DLLs * Object file scanning - locates routines from object files and libraries * Allows for user-defined labels, comments and function descriptions * Understands debugging information in Borland® format * Saves patches between sessions, writes them back to executable file and updates fixups * Open architecture - many third-party plugins are available * No installation - no trash in registry or system directories * Debugs multithread applications * Attaches to running programs * Configurable disassembler, supports both MASM and IDEAL formats * MMX, 3DNow! and SSE data types and instructions, including Athlon extensions * Full UNICODE support * Dynamically recognizes ASCII and UNICODE strings - also in Delphi format! * Recognizes complex code constructs, like call to jump to procedure * Decodes calls to more than 1900 standard API and 400 C functions * Gives context-sensitive help on API functions from external help file * Sets conditional, logging, memory and hardware breakpoints * Traces program execution, logs arguments of known functions * Shows fixups * Dynamically traces stack frames * Searches for imprecise commands and masked binary sequences * Searches whole allocated memory * Finds references to constant or address range * Examines and modifies memory, sets breakpoints and pauses program on-the-fly * Assembles commands into the shortest binary form * Starts from the floppy disk and much, much more!