In need of your correction,please!

[Sally2000]

As I'm writing an article I need someone to help me in English correction.
I would be glad if anyone can help me.
Thanks to all.

Here is the Text for correction:

There are many testing tools for different purposes available in the market from various companies, which makes the task of selecting an appropriate tool very difficult.

Since the testing portion of Software Development is very time-consuming, it’s very important that the tools we choose be both inexpensive and appropriate for what we want to test.

In this project the main concentration is on the automated testing of SharePoint 2007 applications and since SharePoint 2007 is a normal Asp.NET web application the tools which are selected and named here are considered to be more famous among other automated testing tools and also they are focused on Asp.NET and C#:
…,….,…

[bhaisahab]

Originally Posted by Sally2000

As I'm writing an article I need someone to help me in English correction.
I would be glad if anyone can help me.
Thanks to all.

Here is the Text for correction:

There are many testing tools for different purposes available in the market from various companies, which makes the task of selecting an appropriate tool very difficult.

Since the testing portion of Software Development is very time-consuming, it’s very important that the tools we choose be both inexpensive and appropriate for what we want to test.

In this project the main concentration is on the automated testing of SharePoint 2007 applications and since SharePoint 2007 is a normal Asp.NET web application the tools which are selected and named here are considered to be more famous among other automated testing tools and also they are focused on Asp.NET and C#:
…,….,…

Hi Sally2000,
First, let me say that your English is very, very good, you might want to change the "in" to "on" in the first sentence and "focus" instead of "concentration" in the first sentece, second paragraph; and "popular" instead of "famous" in the last line. I think that it is very good as it is.

[Sally2000]

Thanks for your help!