zoho thirdparty app / process lead database

Hi, require application to run on windows or mac (both if possible) maybe in java, that will interface via an API with Zoho CRM and Google API. The process would be to process each record that has not been processed in the Leads module, do a look up in Google for info, do a table lookup for another piece of data, do a few simple calculations, and update three fields in the Zoho CRM Leads module. The result is that the calculations are stored in the crm leads module for marketing purposes. The source code should be well documented for future modifications. This is a relatively simple project but involves a few API's using REST methods and XML. Also, it would be BEST if you had experience (previous projects) with either Zoho or Google API's and Java. Show me sample projects, please. Thank You.