How to develop websites without flash

You would need to give examples of what features you required.

Web designers are looking to CSS and HTML5 to create content that was previously done with flash.

Since you don't mention iWeb, I take it that you are using some other method of creating sites.

Dropdown menus are fairly simple and can use pure CSS...

http://www.iwebformusicians.com/iWeb/css-menu.html

... the more complicated ones use some javascript as well.

Most slideshows use javascript and there are a lot to choose from...

http://www.iwebformusicians.com/iweb-snippets/slider.html

http://www.iwebformusicians.com/iweb-snippets/gallery.html

... but this is the future using pure CSS...

http://www.iwebformusicians.com/iweb-snippets/flux.html

Nowadays its normal to use HTML5 to get movies on a website with fallback to flash for older, out of date, browsers....

http://www.iwebformusicians.com/Website-Movie-Video/Fallback-To-Flash.html

This is the latest version of flowplayer which is very easy to setup...

http://www.iwebformusicians.com/Website-Movie-Video/Fallback-To-Flash.html

Its worth taking the time to learn how to do this rather than use YouTube which is kind of tacky and seems to contain more and more advertising....

http://www.iwebformusicians.com/Website-Movie-Video/YouTube.html

Vimeo is better - especially if you pay to remove the branding...

http://www.iwebformusicians.com/Website-Movie-Video/Vimeo.html

Here's how you can make them popup from a text or image link using jQuery...

http://www.iwebformusicians.com/iweb-snippets/popup-movie.html

You want drop downs?

Here, lots of it :

http://www.wyodor.net/mfi/Maaskant/Some_Menus.html

http://www.wyodor.net/mfi/roodhout/How_To_Do.html

http://www.wyodor.net/mfi/spelling/Welkom.html

And without drops :

http://www.wyodor.net/mfi/Stellar/About.html

http://www.wyodor.net/mfi/cafenoir/Welkom.html

iWeb used to be part of the iLife apps which came with every Mac. Its been dropped by Apple and its not really worth your while paying for it.

There is a good choice of apps available for Mac for web design. See this page for a download of iWeb alternatives...

http://www.iwebformusicians.com/iWeb/Why-iWeb.html

Also have a look at this one...

http://www.quickandeasywebbuilder.com

... or wait for iWeb's replacement...

http://www.iwebreplacementapp.com

drop down menu and slideshow can be done with widgets (iweb widgets - roll your own widgets).

http://iwebwidgets.cyclosaurus.com/DropDownNavBar/Drop_Down_Nav_Bar.html

other slideshows based on iweb photos page:

http://iwebwidgets.cyclosaurus.com/Lytebox/Photos.html

http://iwebwidgets.cyclosaurus.com/Couloir/Photos.html

http://iwebwidgets.cyclosaurus.com/FancyZoom/PhotosPage.html

http://iwebwidgets.cyclosaurus.com/Shadowbox/Photos.html

Apple's mobile devices do not support flash. With or wihout Safari.

There's quite a few considerations involved when trying to get websites to work properly on all devices.

You either need to have a different version of your site for mobile devices or create a responsive design which can be viewed on any device.

Here's a responsive design using jQuery Mobile which showcases a lot of the features...

http://mobile.ezmacwebdesign.com/

This is a more conventional design showing some of the techniques...

http://www.ezmacwebdesign.com/Responsive-Template/

Note how the navigation changes on smaller screens to one that can be easily finger tapped on the Home page only with a "Home" button and a "Back to the Top" button on the other pages.