Houzz - Free
Houzz is a great resource for both professional and amateur interior designers. With loads of photos of beautifully designed rooms, it even links to featured products and allows you to add images to your own ideabooks.

Galleried - Free
This sleek app organizes a slew of well-designed websites into a gallery, and allows you to favorite the ones that inspire you. It's a must-have if you're looking for something to inspire your graphic designs.

Etsy - Free
Like the website itself, Etsy for iPhone brings loads of project inspiration to DIY-ers and crafters on the go. You might think it's just for shopping, but you'd be amazed at what you can make yourself after perusing the available goods. Also use it to follow your favorite crafters.

Pinterest - Free
Pinterest for iPhone lets you create pinboards full of inspirational imagery. Like an image of a room you see on the web? Pin it to a board titled "My dream home." Or, save a color palette that inspires you to a board titled "Colors and Patterns." The sky's the limit! You can also follow your friends and check out what inspires them, and browse a variety of beautiful images by category.

MoMa - Free
What's more visually inspiring than the most famous works of modern art featured at the Museum of Modern Art? This great app lets you browse the museum's collection directly from your iPad or iPhone. We highly recommend it for iPad.

Art Authority - $9.99
If modern art isn't your thing, download Art Authority for iPad to browse all the classics! This app contains nearly every significant work in art history, and lets you browse by artist.

Fab - Free
Fab is the newest discount site ala Gilt and Rue La La, but features only the most well designed goods for your home. This app for both iPad and iPhone provides lots of interior design inspiration even when you aren't in the mood to actually shop.

myPantone - $9.99
Nobody provides more color inspiration than Pantone, and while this iPhone app is a little pricey, it's a great option for browsing colors and creating color palettes. Use it for painting, interior design, and any other form of visual art where color matters!

Flickr - Free
Flickr is the ultimate inspiration for photographers. Use this free app on your iPhone and iPad to browse stunning photos of anything you can imagine -- loads of top photographers use it! Just browsing the images will help you learn what makes a great photo.

Phaidon Design Classics - $13.99
This app by renowned publisher Phaidon showcases 1,000 of the best physical objects ever designed and built. Browse them in coverflow mode or by category.