ash
Ash is a very small Bourne shell. If you need a shell for your embedded systems, this is it.

Datalight DOS
Datalight offers ROM-DOS 6 which is designed for embedded and mobile computing environments and offers all of the features of MS-DOS while adding benefits such as an automated build configuration utility, remote serial disk access, and optional Stacker data compression.

dvgrab
The dvgrab utility will save digital video data from a digital video camcorder or camera into an AVI file. A useful utility if you are into Electronic News Gathering (ENGwear).

glinaccess
The purpose of the G Linaccess project is to make computers accessible to those with low vision through the use of enlarged fonts that are optimally designed in contrast and shape to be readable. A beneficial side effect of this is an easily readable set of fonts for wearable computers running linux.

LINUX
The operating system of choice for many wearable enthusiasts. This links to the linux distribution page where you can select from one of dozens of distributions.

Linux Apps
Their slogan - "If you can't find it here, you won't find it anywhere". If you are looking for a Linux application for your wearable, you have a good chance to find it here.

lynx
Lynx 2.8.3 for Un*x, VMS, Windows 9X. Lynx is a text based web browser with single keystroke commands. An ideal web browser for a wearable system.

SCO
SCO, the leader in business critical servers, offers the Embedded Configuration Toolkit. The Toolkit works in conjunction with the SCO OpenServer 5.02 operating system and the SCO Development Kit to give embedded developers the tools they need to meet the requirements of their applications.

Tangis Software
Tangis Software intends to develop software specifically for wearable computing. Nothing developed yet but this is a good trend.

TinyLogin
TinyLogin is a suite of tiny Unix utilities for handling logging into, being authenticated by, changing one's password for, and otherwise maintaining users and groups on an embedded system. It also provides shadow password support to enhance system security.

WearableTech
Just released their Edeus 1.0 software a knowledge and procedure application for wearable computing.