GIMP - [FREE] Image creation and manipulation.
GIMP is a great free application for creating and touching up your images. Need to tweak your screenshots, create a feature graphic or an advertisement? GIMP is your tool. It's a great free alternative to Adobe Photoshop.
Syncfusion MetroStudio - [FREE] Icons for your app
Metro Studio comes with over 4000 pre-made icons which you can customize to meet your needs - change the colors, change the size and export them to any format you want. See my Syncfusion MetroStudio tutorial for help in getting started.
Paint - Simple image software
Paint is a great simple tool for quickly cropping images and tweaking screenshots.
Image Resizer for Windows - [FREE] Change the size of your images and icons
You'll notice each app store has different image sizes for feature graphics and screenshots which is another pain when uploading your app to the store. Image Resizer for windows however is a quick and easy tool for resizing your images - simply right click in windows and choose your new dimensions and the tool generates a copy of the file with the new dimensions.
Android Feature Graphic Generator - [FREE] Create quick feature graphics
This great website allows you to simple enter the text you want in your feature graphic and it will generate a nice feature graphic for you. Tweak the colors, fonts and even add images. A really quick win if you want to get your app uploaded quickly and Google Play now requires you have a feature graphic.
If you have any other tools you recommend please add a comment and I'll check them out. If you found this post useful subscribe via email using the link at the top of this site.