Since I was recently going through my inventory of Javascript components to update a web site, I decided to link a few of the nicer ones here. They are not as integrated as the GWT or Microsoft Atlas, but – at times – still quite useful:
Tigra Menu
http://www.softcomplex.com/products/tigra_menu/
This is a nice, easy to configure JavaScript menu bar that works quite well across different browsers (with the notable exception of using absolute positioning, so IE and FireFox will *always* require some different handling).
There are a few more components ot SoftComplex – check also their ‘Tigra Hints‘, ‘Tigra Tree Menu‘, and some more of their components.
The basic edition is free – they have PRO components for money.
SynForce
http://www.netspinner.co.uk/synforce/html/synforce.html
This is a small validation library, that comes under LGPL.
Xin Calendar 2
http://www.yxscripts.com/xc2/index.html
Really nice JS calendar that is free, as long as you keep a link to yxscripts.com from your web site. REALLY nice and extremely configurable.