544 vector symbols and counting, representing the visual language of the world, is what you’ll find at the NounProject. Clicking on an individual icon will reveal what the icon means (when known) and allow you to download it. All superbly created vector icons are free for personal and commercial use. The only downside to the site is there is no way to download a single archive of all the icons.
I’m not sure how useful this little gem would be to you, but I found it quite cool because it’s so simple. Artbees has made Flag Creator, a layered .psd file, available for download. The file will convert your flat flag artwork into the wavy flag as seen above. This is not a Photoshop Action file, instead you simply double click a specified layer, paste your custom artwork in the resulting window and hit Save. That’s it, your wavy flag is automatically created.