I am interested in collecting financial data of Governments to analyse the Revenue and Expenditure against their Budgets. Ex:- OpenReporting.com, OpenGov.com.. I have tried to find publicly available data sets from Governments but the success rate was very low. Are you aware of any such publicly available data sets of financial information with lowest level details going up to the transaction levels? If so please list them...
This website collects datasets related to public spending by country:
You should check Open Budget Survey's top 10's national websites for the data.
Among all-in-one place resources, see enigma.io. Here are some datasets:
Russia does well in opening its budget to the public: 10th place in Open Budget Survey.
You can find user-friendly interfaces for:
http://budget4me.ru/ (currently under construction)
For all government units and SOEs. API and dataset access forms:
http://clearspending.ru/ (available in English)
I think it's going to be hard to find all what you are looking for in one place. I would suggest starting with datasets from the UN.
Check on National Accounts at UN Data: http://data.un.org/DataMartInfo.aspx
Check on 'Finance' section at OECD: http://stats.oecd.org/
SIPRI has government military expenditures by country: http://www.sipri.org/databases
Check on Public Sector category at WorldBank.org: http://data.worldbank.org/topic/public-sector