Boa is an experimental JavaScript engine written in Rust that supports over 90% of the latest ECMAScript specification. It includes a lexer, parser, and interpreter, and offers various crates for different functionalities. Users can run JavaScript code via a CLI or in a WebAssembly environment.

OSV is a high-performance CSV parser for Ruby, built using Rust, and offers both hash-based and array-based row formats. It provides significant speed advantages over the standard Ruby CSV library and other CSV gems, especially when using the array-based mode. Users can easily integrate OSV into their applications by adding it to their Gemfile or installing it directly via gem install.