- libSass is a C/C++ implementation of Sass that compiles Sass much faster than the Ruby implementation. It allows Sass to be used by more developers and integrated with JavaScript build tools. - Eyeglass is a Node.js module that allows Sass modules to be distributed through npm and imported into Sass files. It provides file system access and tools for defining Sass functions in JavaScript. - Eyeglass aims to recreate popular Compass features like sprites and make them compatible with libSass and distributed through npm modules. This will provide an ecosystem for shared Sass code and assets without relying on Ruby.