Vishal Kothari

This plugin will allow the customer to choose an order delivery date on the checkout page. The customer can choose any delivery date that is after the current date. The plugin uses the inbuilt datepicker that comes with WordPress.
The delivery date chosen by the customer will be visible to the site administrator while viewing the order under the “Customer Shipping Address” section.
This plugin allows you to improve your customer service by delivering the order on the customer’s specified date.
Pro Version:
<ul>
<li><a href="http://www.tychesoftwares.com/store/jigoshop/order-delivery-date-for-jigoshop-pro" title="Order Delivery Date Pro" rel="nofollow ugc">Order Delivery Date Pro</a> – Pro version comes with a settings page that allows you to choose the delivery week days, enter the minimum time interval (in days) required to deliver any order and the number of dates to offer for delivery. These settings enable the site owner to have a better control on the delivery dates presented on the checkout page. <a href="http://www.tychesoftwares.com/store/jigoshop/order-delivery-date-for-jigoshop-pro" title="Read more..." rel="nofollow ugc">Read more…</a></li>
</ul>

Order Delivery Date for Jigoshop

Allow the customers to choose an order delivery date on the checkout page for Jigoshop store owners.

Saviba

Saviba License Delivery with Google Sheets maps each product SKU to a Google Sheet tab. 
When an order is completed, the plugin reserves the first available row, stores the delivery data in the order, shows it to the customer, and marks the row as sold.
The plugin uses a Google service account JSON credential because it needs permission to read and update the sheet.
<h3>External Services</h3>
This plugin connects to the Google Sheets API only after the site administrator enters a Google service account JSON credential and a Google Sheet ID in the plugin settings.
The plugin sends requests to <code>https://sheets.googleapis.com/</code> to read and update spreadsheet rows, and to <code>https://oauth2.googleapis.com/token</code> to request an OAuth access token for the configured Google service account.
Data sent to Google can include the configured spreadsheet ID, sheet tab names, selected row values, store order IDs, and the Google service account credential provided by the administrator. The plugin does not send this data to Saviba or to any server controlled by the plugin author.
Google API terms: https://developers.google.com/terms 
Google privacy policy: https://policies.google.com/privacy
<h3>Sheet Format</h3>
Default range: D2:K
Delivery columns are configurable in Settings > Saviba License Delivery with Google Sheets. 
Default delivery columns: D,E,F,G,H,I. 
Enter any columns separated by commas, such as D,F,H or D,G,K,M.
The status and store order ID columns are configured separately. 
The plugin automatically reads a range that includes the selected delivery, status, and order ID columns.
Optional column labels can be configured in Settings > Saviba License Delivery with Google Sheets. 
For example, set D to Account or F to TOTP. 
Blank labels keep the original cell text unchanged.
Empty status cells are treated as available. 
The plugin writes reserving while processing and sold after delivery is confirmed.

Saviba License Delivery with Google Sheets

Automatically delivers license or account data from Google Sheets after store orders are completed.

Order Delivery Date for Jigoshop vs Saviba License Delivery with Google Sheets