i've not long installed PicSay Pro - Photo Editor. It allows me to access an image already on my phone (either taken by phone or downloaded form elsewhere) or download one by Bluetooth and play with it. I can bring the image into the app in 3 resolutions - 'Normal' (427X320), 'High' (640X480) and 'Maximum' (1024X768)'.
under 'Menu --> Effects' i can then apply a number of effects like stretch, posterise, paint, Lomo, faux HDR, Tillt-shift, sepia tones etc. But i can also adjust hue, grey scale, B&W, duotone, exposure, contrast, saturation, adjust RGB brightness, sharpen and so much more. Over 50 options in all. No where near PhotoShop quality but more than enough to satisfy.
When i've finished playing i can go to 'Menu --> More --> Transform Picture' and choose amongst other options 'Resize'. This allows me to adjust the size of the image in pixel increments. And finally i can go 'Menu --> Export" and send it off by various Emails including Gmail, Bluetooth, Picasa, Messaging etc.
i seriously love this little bugger! I paid 2.99 Euros (a little over $4.00 US?) for the Pro app version but they have a free version. I haven't a clue what the difference is between free and paid - but i'd gess the resize / export functions would be in both?
here is link to freebie version ...http://www.appbrain.com/app/picsay-photo-editor/com.shinycore.picsayfree