The most commonly used accounting software
is UBS Accounting developed by Sage for me.
I don't know about the best, but if you're
working for a company try to find the most used
accounting software unless you want to make your
own firm then you can go ahead find the best which
suits you.

Malaysia as a whole, I don't know either.
I've asked around the nearest town and company,
most of them used that. As to how much it cost,
somewhere around RM1,200 or so.
I'm still surveying on which accounting software to focus on using though.