- Changing the font from (what I think is) Arial bold to pretty much anything else. A lot of nice web fonts out there nowadays.
- Using simpler visual codes for text: every letter of 'APPs' doesn't have to be a different color and bigger font sized. The MSN messenger icon right in the middle of text is another example of complicated visual code - you could mention in a more appropriate place with text only.
- Decreasing the amount of text and try to explain 'why' I need this.
- It fits my screen, but it could be large for others. Having a vertical layout where you have the text at the top and screenshot(s) at the bottom might free up the cluttered feeling.
- The vertical setup will help with the currently 'floating in space' feeling of some elements, like Supported browsers. I know they are aligned, but they feel isolated and floating.
- A couple of more screenshots of what 'this is' with their relevant explanations. I wanted to see more to understand more.
- More streamlined buttons for Try It, Login and "I want Appynote..." Login and Try it should be the main buttons here, but with its size, "I want Appynote..." steals all the attention.
I hope these help.