Connecting to Oracle Database without Oracle Client

Hi:

I would like to know the other options to connect oracle database (10g) without using oracle client. At present we are using ODP.NET (Oracle.DataAccess.dll) to connect to oracle to fetch/insert/update. I don't want to use oracle libraries any more because of oracle
32 /64 bit issues in 10.2. Please provide me other list of options.

Please throw some light on this.