Compiler: It is a computer program that transforms the source code written in a programming or source language into another computer language i.e. target language i.e. binary code known as object code.

Linker/Locator:

• It is used for relocation process.

• It is done during compilation also it can be done at run time by a relocating loader.

• It is a program that takes one or more objects generated by compiler and combines them into a single executable program.

Debugger

• Debugger allows you to download your code to the emulator's memory and then control all of the functions of the emulator from a PC.

• Common debugging features include the capability to examine and modify the microcontroller's on-chip registers, data- and program-memory; pausing or stopping program executing at defined program locations by setting breakpoints; single-stepping (execute one instruction at a time) through the code; and looking at a history of executed code (trace).

Cross compiler:

It is used to create executable code other than one on which the compiler is run.

They are used to generate executable for embedded systems or multiple platforms.