Finding where to give a Tech Talk

If you have a PhD or you work on a big tech company, is fairly easy to get accepted on the most well-know conferences (e.g. TED talks, PyCon, JsConf, etc) or to get invited by a popular Podcast to give an interview.

However, is not as easy if you don't work on a fancy company or your blog/open source project didn't went viral, even if you are a good developer and have prepared an interesting talk.

So,the question is: where do a non-famous developer can apply for give a talk?

I assume the best alternatives are webinars, rather than in-person conferences, but I don't know which are the best ones.