content: Which web-app idea(s) are relatively unexplored yet? I am basically a freelance web developer who wants to create a separate constant stream of income apart from my usual web projects that I do for my clients. I had explored the idea of android app publishing earlier. However, I feel that the world of web-apps is also profitable, but I just need the right idea. I am a full-stack dev who knows everything on the stack right from bootstrap to jquery on the front-end and php/mysql to java on the backend. But I am unable to find that yet unexplored area or niche that can pay well in the long term. I am not interested in anything BIG like a social media site, that's astronomical work for a solo dev. I want something on a micro scale for say small industries or startups. Here are a few ideas that already crossed my mind: Create a project workflow management app like Asana or Basecamp. I can use my creativity and build a workflow app, but is there even demand for it? There are already free tools like trello, then who will even use my app? How do I find pain points that users might be experiencing in these apps? Create an email distribution/marketing service. Again, mailchimp, aweber  and many others have already saturated this field. I don't think there is even place for a new comer. Create an cloud-based accounting or ERP/CRM package like quickbooks. Though this market is saturated, I think there is scope for a new comer because accounting/ERP systems are a staple need and if I keep the price range low enough, I can get some users. But where I lack is that I just don't know how to approach these clients and do the marketing. There is also the question of identifying pain-points in existing products like quickbooks that I can fulfill (an obvious one is the price point). Can someone give me more pointers abt this?