I'm looking for a good photo editing application for my mac computer besides iPhoto?

I want it to be free to download and i like hipster effects or designs such as rhonna designs app that is on my iPhone.

http://www.everimaging.com/software/photo-effect-studio-pro/
It also has some customized application for professional photos.

Nearly 100 effects for whatever look you can imagine
Liftoff with more navigation options and smoother interface
Allow for many levels of fine tuning
Combine color effects and textures freely
Multiple Color Management

There are some excellent photo editing application for mac computer other than iPhoto.

1. Seashore for Mac
2. LazPaint
3. Pinta
4. IJoysoft Gallery Studio

Grace,
You got a suggestion for "EverImaging". It sure is "free to download", but it costs US$30 if you actually want to use it after downloading.

There are at least ten free image editors for Mac OS. Here is the compact analysis…

- Gimp, Pros: very large number of features. Http://gimp.lisanet.de/Website/Download.html
- Gimp, Cons: huge, clumsy, hard to use, arcane, has poor help files, and sometimes Gimp will apply changes to the original image file as you work, so if it quits unexpectedly, your original image is changed or lost unless you made a backup copy of the file before starting to edit. This is totally unacceptable behavior to any pro photographer whose livelihood depends on not loosing the photos, but they probably wouldn't be using GIMP anyhow.

- Pinta, Pros: fairly large number of features. Http://pinta-project.com/
- Pinta, Cons: It isn't a true Mac OS app, so it looks lousy and needs Mono (a.NET emulator that requires OS 10.5 or later) to run. This means a huge extra download and a not so great look to the interface.

- Seashore, Pros: Small, easy to use. Http://seashore.sourceforge.net/The_Seashore_Project/Download.html
- Seashore, Cons: A small number of features.

From the App Store on the Dock (of OS 10.6.6 or later)…
Fotor, free
XeIMG, free

Online editors (nothing to download, but requires Internet connection to use)…
- Pixlr http://pixlr.com/editor/
- Fatpaint.com: Easy to use, fairly large number of features, emphasis on business logo design.
- DrPic.com: Easy to use, not many options.
- Lunapic.com: Not professional; intended to add quirky effects and convert to animated GIF.

Not free…
- LiveQuartz, US$1.99
- CameraBag, US$20, Pros: fairly large number of features.

You can try GIMP program which is free and is considered as the best alternative to Adobe Photoshop. It has similar features just like Adobe Photoshop and is capable of performing any kind of image editing task. You can also extend its capability for different image editing task by downloading plugins for it.

Here is the link for downloading it and it has support for different platforms-

http://www.gimp.org/....gimp.org/

It is an official site of GIMP program and have tutorials that can help you to get started with GIMP program-

GIMP Manual link- http://docs.gimp.org/2.8/en/

GIMP Tutorials Link- http://www.gimp.org/...tutorials/

After all pros & cons, GIMP is one of the best app for photo editing app. It is often spoken of as a free and open source alternative to Photoshop, though the developers deliberately discount this.