Swiss File Knife - A Command Line Tools Collection
combines many functions in a single, portable executable that belongs onto every USB stick. Search and convert text files, instant simple FTP/HTTP server, find duplicate files, compare folders, treesize, run own commands on all files of a folder - it's all within a single tool.
http://stahlworks.com/dev/swiss-file-knife.html
It is something similar to bussybox.