BasicLinux v3.50
BasicLinux is designed specifically for old PCs. It uses a small kernel and busybox to provide a low-RAM Linux, capable of browsing the web, doing email, and functioning as an X terminal. The current release of BasicLinux is particularly suitable for old laptops — it has PCMCIA capability and includes MagicPoint (a presentation tool similar to PowerPoint).
The current release of BasicLinux is 3.50. It comes in two versions: one boots from a DOS harddrive, the other boots from floppies. Both versions have the option to install themselves to a Linux partition on the harddrive.
BasicLinux v3.50 Official website
Download link to the distribution ISO(Download in same page)