Write some Software

We would like to develop a Free MP3 Trimmer application which will have following functionalities but different in design as you can see in example software: [login to view URL] What we want in this software? -Will have custom slider control to select trimming duration Slider control example [login to view URL] -Example listview is attached -Can select single or multiple files -Drag drop files/folders -Can select files from folder(s) -Can select output folder -Can Add/Remove files -Can select random files from selected files to trim Final deliverable must include -Setup installer -Sourcecode (which I can also compile easily) -A nicely designed + user friendly GUI Free MP3 Trimmer