As it turns out, Marks Work warehouse stocks a leather free steel toe work boot, the Dakota "Chemtec" 8" STSP Workboot. Check their website for details and availability.
The La Sportiva Baruntse Mountaineering Boot is a big mountain boot made from synthetic materials and thus is the mountaineering boot of choice for vegetarians and vegans to conquer 7000 meter plus peaks. Other La Sportiva big mountain boots suitable for those that make ethical choices include the Olympus Mons EVO, Batura EVO and Batura 2.0 GTX.
Available at MEC and other fine retailers, the Salomon Wings Sky GTX Light Trail Shoe is entirely man made. I am in the market for a pair of hikers, but will probably wait until spring. It also looks like Soloman has other hikers available that contain no leather products including Wings Sky GTX2
Mountain Equipment Coop has a listing for vegetarian backcountry meals. Naturally no listing would be complete without my favorite, Backpackers Pantry Pad Thai.
I just bought a North Face Dark Star -29 celsius synthetic sleeping bag. It had decent reviews, stay tuned for updates.
The La Sportiva Trango Series which include the Trango S Evo, the Trango Prime and Trango Extreme are all made from man made materials. I personally own both the Trango Evo and Trango S.