Yup, you are in the right place. Welcome!
There are many many tools for opening municipal budgets. I would of course normally advise you: openspending.org to upload and visualize the data. But that is currently being redeveloped, a relaunch should take place in the coming months, you will hear it here when we are ready again.
So if you have now some budget data that you would like to upload and visualize, you might want to play with the tools at: http://spendb.org/
If you were more looking for good examples, put your google translate on and look at some of these examples:
Dutch municipal data: openspending.nl
Italian Regional Data: http://www.opencoesione.gov.it/
Local Budgets Connecticut - http://opencheckbook.ct.gov/
And last but not least, if you are working in Isreal, do you already know the guys from Obudget/Hasadna: http://www.obudget.org/#main//2014/en @adam @Mor can you connect Ofer further?