I am aware of CSS gradient generators such as Color Zilla
Do CSS rounded corner generators exist that work across many browsers?
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This one has worked really well for me.
You can use CSS3Pie to replicate CSS3 support in Internet Explorer (versions 6-9)
As stated on their site:
PIE currently adds full or partial support to IE 6 through 8 for the following CSS3 features:
- multiple background images
- linear-gradient as background image
In addition, PIE adds support for border-image and linear-gradient to IE 9, which already supports the other features natively.