http://developer.android.com/tools/extras/oem-usb.html#Drivers
The above link contains a list of OEM USB Drivers for many manufacturers.
The android phone I want to hook up with eclipse is running Gingerbread. The manufacturer (not the one in the above list) didn't provide any USB driver (and I confirmed it from the company's side). Has anybody found themselves in the same position and found some workaround? I think custom ROM installation will also be hard without an USB driver, isn't it?
Check out this page on setting up and using a Universal Android Debug Bridge (ADB) driver. I've found it useful in the past, but not quite as clean as using the specific OEM drivers.
https://plus.google.com/103583939320326217147/posts/BQ5iYJEaaEH