Highly Recommended Hikes for all levels

Winner Creek in Girdwood
Four miles one way, although I've only ever made it to the tram and turned around.  This is a fun, flat, easy hike.  Great for families, but I generally seek a little more thrill when I hike (peaks, scrambling, etc.)
http://alaskahikesearch.com/hikes/winner-creek/

Byron Glacier near Portage
Easy 1.2 hike to a glacier.  I haven't done this hike in a few years, but I know from driving by that many of these glaciers have receded a good amount.  It may be a longer hike to actually get to the glacier, but it's a nice walk regardless.  Also great for families!
http://alaskahikesearch.com/hikes/byron-glacier/

If you like this hike, I would highly recommend Portage Pass (scroll down to see more info or click on link) http://alaskahikesearch.com/hikes/portage-pass/

Powerline Pass
From start to finish, this hike is 14 miles, but you can do any part!  I hiked from Glen Alps to the bridge (2.5 miles) alone and then again with a friend.  The trail is busy and wide enough that I didn't feel too paranoid about running into wildlife alone, but I would still proceed with caution, especially in the spring.  The trail is very flat, making it easy to run, bike, hike, take children, etc.  I can't wait to complete all 14 miles of this hike!
http://alaskahikesearch.com/hikes/powerline-pass/#.V0j-da6rRo4

Mt. Baldy in Eagle River
1.5 miles uphill with a great view on a clear day!  This is an awesome hike because it is short enough to complete in a couple hours and close enough that you don't need all day to drive, hike, etc.  There is a path to the neighboring peaks for those who want to continue.  The link below describes this hike as moderate, but I would say it is somewhat easy.  There are a few steep parts but not as much scrambling as Flat Top.  Would be a good alternative for those who are looking for something other than FT.
http://alaskahikesearch.com/hikes/mt-baldy/#.V0h3La6rRo4

Bird Ridge off Seward Highway, 25 miles south of Anchorage
One of my favorites!  TOUGH 2.5 miles uphill and lots of false peaks.  Awesome hike on a beautiful day as it gives you a phenomenal view of Cook Inlet.  You can also follow the ridge if you wish to continue further.  Bring food, water and layers--you will be hungry, thirsty and sweaty by the time you make it to the top!
http://alaskahikesearch.com/hikes/bird-ridge/