Is it possible to integrate Zoho CRM with Drupal Webforms?
Please checkout http://www.drupal.org/project/zohocrm. There isn't a submodule in there to specifically syncronize webforms, however, when you have zohocrm set up properly, it's pretty easy to use it with some custom code to send webform data to zoho. In the code below, we are inserting a Case into Zoho. You could easily modify to insert a Lead or Contact:

/**
 * Implements hook_webform_submission_insert().
 */
function my_module_webform_submission_insert($node, $submission) {
  $components = $node-&gt;webform['components'];

  // Get all submission values.
  $form_values = array();
  foreach ($components as $key =&gt; $component) {
    $form_values[$component['form_key']] = $component['type'] == 'textfield' ? check_plain(trim($submission-&gt;data[$key]['value'][0])) : $submission-&gt;data[$key]['value'][0];
  }

  switch($node-&gt;nid) {
    case '234':
      $notes = 'Phone: ' . $form_values['phone_number'] . "\n";
      $notes .= 'Message: ' . $form_values['message'];

      // Build Zoho data for Case.
          $data['records'][] = array(
            'Request Type' =&gt; $form_values['topic'],
            'Subject' =&gt; $form_values['subject'],
            'Description' =&gt; $notes,
          );

          // Send case data to Zoho.
          my_module_send_record($data, 'Cases', NULL, TRUE); 
    break;
  }
}




/**
 * Send record to Zoho to insert or update.
 */
function my_module_send_record($data, $module, $record_id = NULL, $workflow = NULL) {
  $zoho = zohocrm_get_client();
  if ($zoho === FALSE) {
    return;
  }

  zohocrm_log($data, 'ZOHO DATA');

  $zoho-&gt;setModule($module);

  // Trigger Zoho workflow rules
  if ($workflow) {
    $params = array('wfTrigger' =&gt; 'true');
  }

  try {
    if (!empty($record_id)) {
      zohocrm_log('UPDATE RECORD');
      $response = $zoho-&gt;updateRecords($record_id, $data, $params);
    }
    else {
      zohocrm_log('INSERT RECORD');
      $params['duplicate'] = 2;
      $response = $zoho-&gt;insertRecords($data, $params);
    }

    watchdog('zohocrm', t("Successfully sent data to Zoho CRM. Zoho module: @module"), array('@module' =&gt; $module), WATCHDOG_INFO);
    zohocrm_log($result = $response-&gt;getResponse(), 'ZOHO CRM RESPONSE');

    // Let other modules process their tasks.
    module_invoke_all('zoho_record_sent', $data, $module, $result['recordId']); 
  }
  catch (Exception $e) {
    drupal_set_message(t('Sending data to Zoho CRM failed. Error message: @message', array('@message' =&gt; $e-&gt;getMessage())), 'error');
    watchdog('zohocrm', t("Sending data to Zoho CRM failed. Zoho module: @module. Error message: @message"), array('@module' =&gt; $module, '@message' =&gt; $e-&gt;getMessage()), WATCHDOG_ERROR);
  }
}