Gadgetopia

JavaScriptTemplates: With all the Ajax and client-side stuff floating around these days, we really need things like this.

The JST engine is written entirely in standard JavaScript. It supports a productive template markup syntax very much like FreeMarker, Velocity, Smarty. JST is a readable alternative to manually coded massive String concatenations and major DOM/DHTML manipulations.

TrimPath — the company that wrote this — makes some other really snazzy tools, like a Web-based spreadsheet and Ruby on Rails ported to JavaScript (no, I haven’t looked at it, and I’m afraid to).

Update: I just realized that this is the same company that did Num Sum, which we’ve talked about before.