There are 2 repositories under reverse-ip topic.
Domain Parser for IPAddress.com Reverse IP Lookup
It is a reverseip tool. Grab only main Domains. Fast and own priv8 API
Discover Domains Associated with a Reverse IP Lookup
Kaga is a Reverse IP Lookup tool written in PowerShell and BourneShell to make it easy to use in any environment.
simple reverse ip
A Python Based Reverse IP Script To Find The Domains On The Server. Coded By Hackeraj
Take an IP and try to look for the domain/host associated with it.
Reverse IP/DNS API client library for Python
Query Myip.ms data using API
Node.js module to scrape and extract result from rapiddns.io
ReverseIP using python requests website securitytrails.com
letsreverse demonstrates effective retrieval of reverse DNS and IP information.
Reverse IP/DNS API client library for Go