But I also built an infrastructure configuration server from the 2kB http://www.rebol.org/view-script.r?script=webserver.r to avoid LDAP/Chef/Puppet and similar bloatwares.

What do you consider a Unix tool? File and directory handling and serial port access just as HTTP/IMAP/POP/SMTP clients are all built in. See http://www.rebol.com/docs/core23/rebolcore-12.html and http://www.rebol.com/docs/core23/rebolcore-13.html

Instead of lex/yacc it provides the parse function and instead of grep it also provides the parse function (with a more readable BNF-like syntax, which is less effective to write for very small hacks, thats true).

http://www.rebol.org/script-index.r