Where can I find an online Latin dictionary that will let me search for conjugated verbs?

I'm an advanced Latin student but now and then I have trouble finding a verb in my dictionary because it has irregular principle parts. I have scoured the internet but to no avail: is there anywhere that I could plug in a conjugated verb (or perhaps a declined noun or adjective) and get a result, rather than having to plug in the infinitive or first person singular form?