SQL Server provides with a stored procedure which can be used to get a list of all OLEDB providers on a machine.
Stored procedure:
xp_enum_oledb_providers
Executing this stored procedure which is in master database with the following statement
EXEC master..xp_enum_oledb_providers

 
gives a list of all available OLEDB providers on my machine.

This code will retrieve a list of currently running process on a machine and write their names to console.

// Get A List of process using
// System.Diagnostics.Process class
List<Process> processes = Process.GetProcesses().ToList();

// Write them out to Console
processes.ForEach(x => Console.WriteLine(x.ProcessName));