Multi-Format Audio-Encoder Front-end
LameXP is a free multi-format audio file converter that supports a variety of output formats, including MP3, AAC/MP4, Ogg Vorbis, Opus, as well as FLAC, and an even higher number of input formats. It also supports batch processing and can utilize multiple processor cores.
Wacvst (windows-mac vst) is a tool that will wrap Windows native VSTs for use with Intel Mac OS X based VST hosts.
winLAME Portable Edition is the winLAME audio encoder packaged as a portable app, so you can take it with you on a USB drive, iPod, etc and use it on any computer.