Custom software development services are available in India for healthcare, JavaScript, food delivery, fintech, and restaurant management. Some prominent companies specializing in these areas include Cerner, Tata Consultancy Services, Infosys, Mindtree, HCL Technologies, Zomato, Swiggy, Uber Eats, Razorpay, Paytm, Tally.ERP 9, POSist, and Zoho Restaurant POS. It is important to research companies thoroughly to find one that aligns with specific requirements, budget, and project scope.