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.
This is a small validation library, that comes under LGPL.
Xin Calendar 2
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.