Be careful when asking this type of question. Be as specific as you can be about your requirements to avoid just generating a list of everyone's favourite application.
Ensure that you have done prior research beforehand and detailed this in your question. Having a web application that almost solves your problem is a huge plus point for your question as it offers a good starting point for comparison as well as something to constructively answer.
If you are merely looking for an alternative app or service, start a web search as your first port of research. Search terms to try include (where product is the name of the current app):
product "better than"
Also consider looking at directories and compilations such as Alternative.To and GetApp.com as these will often show you many valid choices if you're looking for something else. See this meta discussion for more information.
- Is asking “is there a webapp for x” on topic?
- Is it accepted to answer questions with non web-based solutions?