Best art mat cutters & blades according to redditors

A really good tablesaw with the right kind of sharp blade that's well tuned with a zero-clearance insert and the height set right might work ok if you use it well, a crappy tablesaw will just mangle the foamcore instead. But if your hands are too shaky to use a straight-edge, I wouldn't advise using a tablesaw.

I would suggest looking into products like this before going for something like a tablesaw, it's much more in line with what you seem to need.

This needs to be higher up. While no doubt anyone can get good cut with a hobby knife or box cutter after some practice, getting the right tool is the best way to ensure even a novice gets nice clean cuts. FoamWerks tools are the Rolls Royce of foam cutting, but even a simple tool like this $8 xacto board cutter will greatly improve your cuts and will allow you to make easy tongue and groove joints. Here's a video tutorial on how to use the board cutter.

I highly recommend you order yourself one of these. You can find some tutorials on the net as well. Check out the tutorials from Esoteric Order of Gamers here. Some good tips there.

Not cheaper bit I think better.
The Logan stright cutter
I use it with my mat cutter but it works with a good metal ruler as well.

http://imgur.com/hCaRqL3

This is the my third make of a frame jig. Each version has been incrementally better. I gave up using my own tools and paid my sign maker buddy to use his cnc machine to make me a perfect triangle. It was worth it. I've learned a 6 pack can buy you allot of favors.

The finish is a product called waterlox I belive. I'll edit that later.

This is what I have for holding the glass in. Maybe not the specific brand, but tool; Fletcher-Terry 07-500 Fletcher Frame Master Point Driver Wood 5/8 in. https://www.amazon.com/dp/B000DZF41W/ref=cm_sw_r_apa_DO93ybGZHSAYS

Very nice.
I am currently working on some foamcore storage for TI3 as well. Basing mine off of a post on BGG from a guy using chitboard/cardstock.

To aid in 45 degree cuts, take a peek at this: Amazon linky

Thank you for the link. I do like how you cut the box size down. Very well executed.

on a side note, you might take a look at a Hobby Lobby if you have one near you. Usually, the foamboard is beside the framing section (at least at the 4 in my city they are, I assume they use a similar floor plan at each store) Well, there are some vertical storage bins that contain thick matboard, mostly used for framing. At my locations they have large sheets of 3mm foamboard (about HALF the size of the traditional foamboard) which is REALLY nice to work with.
I'll admit, two problems are they only come in LARGE boards (which I usually cut down when I get home for storage and so it doesn't warp) and that I have only seen it in white with white core.

I am a fan of the black/black core myself, but am learning to like this thin/white FB as it allows me a little more room when it comes to designing inserts. (as sometimes that 2mm difference is HUGE)

I used and Xacto foam core knife I bought off Amazon.

It was $19.99. I'm sure any hobby knife would work but people recommended this one in a foam core thread so I bit. I'm pretty happy with it, very smooth cuts. But I've never tried cutting foam core with anything else.

https://www.amazon.ca/gp/product/B000HGK840/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

Solution: http://www.amazon.com/Quality-Park-Safety-Ceramic-46904/dp/B0035YEWD4

You need this :)

https://www.amazon.com/gp/product/B004P2ZTQE/ref=s9_acsd_zwish_hd_bw_bs6zr_c_x_w?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=merchandised-search-5&pf_rd_r=WGJTD10EX127Y90MB2S8&pf_rd_t=101&pf_rd_p=1a66659e-58a3-5857-9531-81c3ce021110&pf_rd_i=12896611

It essentially holds razor blades, use something similar for cutting mattes and it's like butter.

They make A 90 degree blade. I have an exacto one, but from what I understand they don't make those anymore. Here is a knockoff of mine. This was a literal game changer.

It's called a mat board cutter. There are definitely more professional tools, but this thing works perfectly if you're just cutting one or two things here and there.

Amazon to the rescue: ten 16" x 20" mats for $20.

https://www.amazon.com/Golden-State-Art-Picture-Pictures/dp/B00LLP1RQO/ref=sr_1_6?ie=UTF8&qid=1484250310&sr=8-6&keywords=mat+16+x+20

Also, a mat cutter is about $25: https://www.amazon.com/Logan-Graphics-4000-Deluxe-Handheld/dp/B007RHB2PG/ref=sr_1_2?ie=UTF8&qid=1484250490&sr=8-2&keywords=mat+cutter

As for "some proportions of art might not have a frame that it will look good in," that's why I only said "consider" and "(without looking weird)."