Wood and cardboard
For the laser cutter, we stock sustainably sourced "RevolutionPly" plywood cut to 24" x 18." Scraps from previous projects are on the shelf and we encourage users to make use of scraps for smaller projects. We also stock 24" x 18" corrugated cardboard. Some scrap acrylic is available, left over from other projects. Extruded acrylic (good for cutting) and cast acrylic (better for engraving) are available from McMaster-Carr. The acrylic sheets sold at hardware stores like Lowes are extruded.
All of our printers use 3mm (nominal) filament. We stock PLA on 1kG spools, in whatever color happens to be cheapest at the time we re-order. If you need another color, Amazon has a good selection. You're welcome to donate your leftover material for use by other students.
We maintain an inventory of threaded fasteners. Look through the bins by the back door, or search this spreadsheet to look for a specific size. If there's something inexpensive that you need and we don't have it on hand, send the stock number from Fastenal to Dr. Walker and we'll include your fastener on our next regular Fastenal pickup.
http://fastenal.com is a good source for fasteners and other supplies, with local stock in mid-city. They'll deliver to the MakerSpace.
http://www.aluminumandstainless.com offers sheet and extruded materials as their name indicates. They're in Treme, and they will cut and deliver to Tulane.
Look at the list under the "Other Resources" tab at left. McMaster typically delivers next day from their Atlanta warehouse and their web site is phenomenal.