"Professional development is largely personal, what are some things you can do for free to improve your technology skills?"

Often, there are lots of offerings for continuing education/professional development offered by our own school districts--at least the larger ones. I think a lot of times, if you are from a smaller district but show interest in what a larger district has to offer, they will often allow you to join them. I haven't checked, but I would think that the State Department of Education would also have links and listings of potential development offerings.

I would also check into the colleges and universities nearby to see what they might have to offer. Most colleges with education programs have a lot of outreach efforts that are free or have a very low cost.

Plus, the biggest resource we have is the internet itself. There are online resources, webinars, websites dedicated to professional development as well as postings on YouTube. There is a plethora of opportunities available, it is always a matter of looking for them and also networking with others to have contacts who are also looking for opportunities and are willing to share what they find.