I'm planning on modifying an image I took and doing something with that, As Mike says, there is plenty you could do and I'm sure you have the skill to do it
Nice selection of works here ScifiGirl. I love how you manipulate your space images with eartbound images, very well thought out. Top class stuff
Click Here for info about curves. Then when you want to go further try this plugin Curves +
Same as nitenurse, all the pinned packs. TechnoRobbo's and RedOchre's packs are my go to plugins, Curves+ is another one I depend on. If it was legal I would marry Clipwarp also Color Flip/Rotate is a must have.
Beckoning Light is another stunning work from you Helen. Gloss and more gloss, I'm gonna need to wear sunglasses browsing your gallery soon. Amazing things you do with pdn, always a pleasure to view your works
Don't be put off, just install what you think you need, the plugin index will always be on the forum for when you want to grab a new one and it will be up to date and virus free.