Virtual LEGO Building Mecabricks.com is a website that allows you to Build & Render 3D Lego Models in your web browser. There is no plug-in or download installations required and you can save and take your work with you on different computers, phones or tablets. Thousands of bricks and models are pre-loaded for selection.
LEGO Kids The Official LEGO Website has a kids section with Games, Videos, Set Information, Activities and much more for younger LEGO Enthusiasts.
Custom Minifigures There are a number of websites that offer Custom Minifigure options from custom pre-printed pieces all the way to completely custom user-submitted designs. Some options including Minifigs.me and Minifigures.com
LEGO In Stock Alerts Brickhound is an interesting website where you can sign up for SMS Alerts to be sent to your phone whenever a LEGO product you are tracking comes in Stock on LEGO.com or Amazon
LEGO Mosaic Designer A website now exists that lets you upload any image and convert it into plans for a LEGO Mosaic using LEGO Dots or exemplar Mosaic tile pieces.