Software testing is a method by which a system or a program is assessed in order to detect loopholes or bugs within that program. This testing ensures that the quality of the software is maintained and no further failure of any part of the software occurs. Loopholes in a system may not be only due to coding errors; it can also be due to the inability to understand all the requirements of the system. Broadly speaking, a system developed should be usable, scalable, secure, efficient and strong to withstand the loads. For instance, a programmer writes a few thousand lines of code. It is quite obvious that he/she may make a mistake which may go unnoticed. This mistake results in a software bug. The code gets compiled properly but will not give the desired output. This leads to the failure of the code. Also, out of the few thousand lines of code there are chances that a few lines of code may be dead. The dead code will not affect the system until the platform changes. If the code is written specific to a particular hardware platform, it may result in a complete failure if ported onto a different hardware. Also it is easier to rectify a defect in its early stage. Bugs, if left unsolved can be very disastrous!

Software testing tools are used to verify and validate software. There are two methods of software testing; blackbox testing and whitebox testing .The basic difference between whitebox testing and blackbox testing is that the former has knowledge about the algorithm of the program and the latter does not. A few, out of a number of the software testing tools available, are listed here.

1) OEngine: This is a bug tracking tool. This tool can perform a number of tests such as Web Service testing, AJAX testing, stress testing and many more. It provides real browsing scenario in a virtual environment. Also the bottlenecks present in the system can be detected and eliminated using this tool.

2) ApTest Manager: This is a test management tool which provides quality assurance and quality control tests. Both manual and automated testing can be done using this tool.

3) USB tester: This is an embedded software testing tool which allows a user to validate and test a USB device. The no of software testing tools available are vast in number. The requirement of a system decides which tool should be used to detect the flaws in it.