add: packages links

Author: bigdatacloud-api

README.md

@@ -17,6 +17,16 @@ You can access any and all BigDataCloud APIs with a free API Key.
 To get your API Key, just access your account and retrieve it from your [Account Dashboard](https://www.bigdatacloud.com/account).
 If you are not yet a customer, it is completely free to join.
 
+### BigDataCloud API Packages
+
+All BigDataCloud APIs are bundled into five different API packages. Each API package has its own subscription plans and pricings. 
+
+You can find more details on the respective API packages page.
+- [IP Geolocation Package](https://www.bigdatacloud.com/packages/ip-geolocation)
+- [Reverse Geocoding Package](https://www.bigdatacloud.com/packages/reverse-geocoding)
+- [Phone & Email Verification Package](https://www.bigdatacloud.com/packages/phone-email-verification)
+- [Network Engineering Package](https://www.bigdatacloud.com/packages/network-engineering), and
+- [Free API Package](https://www.bigdatacloud.com/packages/free-api) (doesn't require account creation and API key)
 
 
 ## Documentation