The positives for Tally include: [i] it doesn't really expect the end user to have an expertise equivalent to a CA [ii] fairly rapid inclusion of business rules according to Government directives [iii] an enterprise edition that allows distributed data collection points and consolidated reporting
Can tinyerp or weberp have the above features included in !! are these accounting packages tweakable as per India Laws.
i did check put GnuCash, but i guess its more for personal accounting.