(random suggestions: USE COMPILED JS TEMPLATES!)

• jQuery Templates
  • last code update: Jun 2011 (as of September 2011)
  • they're official!
  • writeups: [1] [2] [3] [4] [5]
• PURE
  • last code update: being constantly updated (as of June 2011)
• mustache.js
  • last code update: being constantly updated (as of July 2011)
• prototype.js's templating
  • last code update: being constantly updated (as of July 2011) [though that stat is for the WHOLE prototype.js, which is much more than just the template]
• John Resig's Micro Templating
• underscore.js's template
• EJS (Embedded JS)
• nano
• jQote2
  • last code update: Nov 2010
• mjt
  • last code update: Oct 2010
• TrimPath // JavaScript Templates
  • last code update: August 2010
• Closure Templates
  • last code update: July 2010
• Jemplate
  • last code updatE: April 2010
• Ajax-Pages
  • last code update: July 2009
• srender
  • last code update: Apr 2009
• jTemplates
  • last code update: February 2009
• google-jstemplate
  • incremental and differential processing seem like really good ideas
  • last code update: August 2008
• Mark Turansky's
• web.js?
• Tempo
• json-template
• more
• more
• more
• more