Originally Posted by HomerSimpson

Photoshop:
Pixlr (in browser), Muro (in Browser) or Krita, GIMP or Paint.Net

Dreamweaver:
(this is a bit hard since there's no exact thing and depends on your knowledge, etc.. but take a look at these)
Aptana, Komodo Edit, CodeLobster, SublimeText, Atom

Premiere:
- For complex video editing: HitFilm Express or VideoPad Editor
- For simple video stuff (cut and compress): Avidemux, Handbrake, Freemake, Youtube Editor (in browser)

Now these are all free tools. They are not as powerful as Adobe but if you combine them you might end-up with the same results in the end...

There are many options out there so take your time and explore them all (try them out)...

The big question for you - is it worth the hustle... if it is than go for it!

You didn't said PC or Mac... My list above is software for PC.