I searched for a lot of cover letter templates but none matched my requirements so I designed this cover letter template. It also contains instructions as guided by my university team to design a body of cover letter.
You may download and view the template from the file Cover_Letter_Template.pdf
I recommend the following resume template to go along with this template:
The header for my teamplate is made to match the header of above template, so they act as a set. Of course, yo u dont' have to use them and you may use it separately. You have full rights to modify and use it as your own and distribute as you want.