Everybody seems to be posting pictures with captions on them. It's turned out to be a great way to express yourself on Facebook and many other social media. I use it here on examiner.com for many pictures that appear on my political buzz articles. My dressed-up cats can get my point across without seeming too preachy or accusing. You can use a captioned photo for humor, to show off your children, or to make religious or political points. The only rule is that you must own and have the right to use the picture you're captioning. Of course, you can like or re-post pictures on the social media!
As a retired citizen, I still use simple make-do applications that are easy to load on my laptop. For those with better budgets and more gadgets, there are a multitude of photo-enhancing applications you can get, even for your mobile phone! You may find some of these at android app for pc. They all include drawing applications so you can really do multi-media work.
For those who have to 'make it do or do without', as the old Depression Era rhyme has it, I've provided a slideshow of what you can do with the limited but readily available Microsoft Paintbrush.