Naturally, no company flaunts its association with their annual report consultants, but any consultant worth its salt, usually puts its name at the last page. For instance, see how the Shree Renuka Sugars annual report last page contains the company name/logo and in fine print and written upside down, the consultant's name! Also, one can google for 'Concept and Design' or 'A...product' to identify these, but last page suffices.
A few agency names I've come across while reading annual reports are(with names of company in bracket)
- Wyatt Solutions(www.wyatt.co.in)-Shree Renuka Sugars
- Trisys(www.trisyscom.com)-Greenply, Reliance, BPL, Saregama India Ltd and VSNL
- Numero Uno(http://www.numerouno-india.com/)-Persistent Systems-this incidentally is a company which consistently wins ICAI's awards for best presented financials.