is there a PDF in which we can find all Certified Add on solutions for AX?
Can you give some examples ... of what sort of addons are you talking about.... In case you are looking for integration with other Microsoft product like Reporting and Analysis then i believe these are certified by microsoft and you can get the documentation on the Microsoft customer or partner source or technet. Batches,Emails,Alerts and Workflows are already built with in Dynamics and you just need to switch them on.
In reply to Hardeep:
it is not a "sort of addons" , but ALL certified for AX.
some unique reference guide to see all add ons to a certain business in order to compare and try to find out the best...
i suppose the file exists, but i cant find it on microsoft websites.
i found one for NAV