lame and razorlame(gui) are encoders
I guess not

LAME features:

* Many improvements in quality in speed over ISO reference software. See history.
* MPEG1,2 and 2.5 layer III encoding.
* CBR (constant bitrate) and two types of variable bitrate, VBR and ABR.
* Encoding engine can be compiled as a shared library (Linux/UNIX), DLL , Directshow filter or ACM codec (Windows).
* Free format encoding and decoding.
* GPSYCHO: a GPL'd psycho acoustic and noise shaping model.
* Powerful and easy to use presets.
* Quality better than all other encoders at most bitrates.
* Fast! Encodes faster than real time on a PII 266 at highest quality mode.
* MP3x: a GTK/X-Window MP3 frame analyzer for both .mp3 and unencoded audio files.