• IDA a disassembler. It tries to retrive the code, data and flow from the binary dump of an executable format. It does it with a "dead" program i.e. without executing it.
• Olly (like SoftIce) is a low-level interactive debugger. It works on the "alive" program that is you have full control while the program is running.
• Vtue is profiling tool. It gives you a detailed report that how many times each line of the code in your program has been executed and how much CPU time was consumed. This program also works with an "alive" program i.e. it extracts this information while the program is running.