Very Quick File Server

Just cd into the desired directory, and run python -m SimpleHTTPServer. You get the message "Serving HTTP on 0.0.0.0 port 8000 ...". Now go the browser and type localhost:8000, and start browsing files/folders in that directory. Share the link http://<your IP addr>:8000 to let your friends browse as well.

[Tested on Ubuntu 10.04 (64-bit) with Python 2.6.5.]