SliTaz is an operating system that provides a fully featured desktop or server in less than 30 Mb. SliTaz is simple to use, fast, and stable. In Live CD or USB mode, it runs entirely in memory (RAM). SliTaz has an active community all over the world and can be used in several languages.
MaheshaDragonBSD is a Live USB distribution based on MaheshaBSD and DragonFly BSD 3.0.2. It contains Midnight Commander, vsftpd server, and a prebuilt vkernel in the /myinstall directory, which you may immediately try by running the 'rune' script in the /myinstall/vkernel directory; however, no root image is available, so you must make your own.