alternative to filemaker webdev

I don't know of any other solution like FM that let's you build a database and publish it online like FM does.  At least not quite that easily.  There are lots of good web-based solutions, though, that would make your life a lot easier when trying to work with web apps in general.  FM is great for local solutions and even distributed run-time solutions, but it really lacks when trying to tie it into web apps.

If you want to provide more details on exactly what you're doing I may be able to steer you in a good direction.  

Are you comfortable with PHP programming?

I would agree with Andrew. Also consider that while the cost of FM Server and concurrent connections might seem like a lot, you will likely be investing considerable money and time into whatever alternative you turn to. WebDirect does a pretty amazing job of rendering a FileMaker layout in a browser and is notably faster than IWP. You could learn PHP and use FileMaker's PHP Site Assistant to get you started but unless you're familiar with that kind of logic based coding, you're in for a long learning curve. Using WebDirect costs money up front but will allow you to continue doing what you've been doing with no additional knowledge required or down time.

thanks for praising fmp but question was for an alternative