Assalam alaikum

We have obtained a colour coded tajweed Quran published by Dar Al Maarifah that is available online on Google Books

It is 608MB in size.

Download it here

Colour Coded Quran (Tajweed Rules) Online Fully readable and searchable on Google Books

Uthmani Font: http://books.google.com/books?id=EwyRGM3KFswC&printsec=frontcover&source=gbs_v2_summary_r&cad=0#v=onepage&q=&f=false

Urdu font: http://picasaweb.google.com/alzkar

screenshot below:

Again, the PDF for download is here.