Ollydbg One-shoot Review

Olly debugger or Ollydbg is application portable with so many function about

• 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

Ollydbg can to help indentification malware or a cracker use it is for crack serial number of  commercial software.

Source : http://www.ollydbg.de/