C# / .NET
- DynamicBuilder Suspiciously pleasant XML construction API for C# 4, inspired by Ruby's Builder
- Nate Simple little fluent state machine for C# that doesn't have its way with your architecture.
- ArgumentReflector Spoonful of syntactic C# 3.0 sugar for accepting named, optional, method parameters via anonymous objects.
- Pavlov Rich, Behavioral, API over QUnit
- jQuery.lifesupport Smart, simple, and secure session management plugin
- jQuery.safetynet A smarter in-browser "unsaved changes" warning plugin
- jQuery.autotype Simple, accurate, typing simulation plugin
- jQuery.netchanger Plugin enabling a rich extension to the DOM onchange event
- jQuery.flextarea Smart HTML5-aware auto-resizing textarea
- jQuery.fasten Slightly smarter fixed positioning plugin
- jQuery.confine Textarea maxlength, Done Right
- jQuery.updatepanel proxies ASP.NET AJAX client-side events as native jQuery events via the jQuery Special Events API.