Well, an update, for those interested. We went on a 3k walk tonight, and are planning on picking up some art supplies (most likely those designed for children, because unlike him, I have ZERO artistic ability) and playing.
As for computer games, anything that requires fine motor skills is outta the question. I shake waaay too much, causing me to screw up, get frustrated, and debate throwing my mouse across the room. It’s not good for anyone!
When do tam tams start?
I’m pretty into learning Japanese in my free time right now, but that probably doesn’t appeal to you so much. 
I read, watch TV, drink beer, play games, and hang out with friends. I also enjoy pool. Sorry, I got nothin. I’m boring.
I think BellRungBookShutCandleSnuffed is onto something! Why not learn a language together - you could drill each other on word lists (ordinarily considered a lame exercise, but fun if you can have two people who are close sharing the experience, and perhaps engaging in a little friendly competition).
Spring is here.
Therefore, scan the local paper for free public events!
Carnivals, street fairs, free music festivals (Jazz is often available this way), arts & craft shows.
Not that all the suggestions so far aren’t great, but am I really the only one who’s going to say talk?
Yeah, you live together, you talk to each other all the time. But when was the last time you sat down together with a couple of drinks and had a really interesting * conversation? The kind you had when you were first dating and getting to know each other and trying to impress each other with your wit and erudition?
It’s fun and free!
*For all I know, you do this constantly, but if so, you’re rare. Long-term relationships tend to suffocate the art of conversation, and which takes its revenge by leaving you staring at each other wondering what the hell to do until the laundry is done.
Have an argument.
Have a paper-wad fight.
Plan your dream home together. (We talk about this when we’re bored. We want our office/den in a treehouse.)
For the future, get some Nerf guns.
Draw on each other in places normally hidden by clothing. Bottoms of feet and ballpoint pens work well. Also, it tickles. (I do this to my poor longsuffering husband now, whenever I’m bored. I draw faces on the bottoms of his toes, and once a horribly lopsided skull and crossbones on his shoulder.)
Put some music on and dance the night away.
Been there, done that
I like to stack things together. Example: I like photography, history, and flying. My idea of fun would be to research something historical and then take aerial pictures of it (not a good example for doing something cheaply).
Looking at the suggestions so far:
Kite flying: make 2 kites and fly them in battle or fly them at night with glow sticks.
Puzzles and books: buy a cheap puzzle and get a mystery book on tape. Or download an old radio mystery.
Go hiking and birding or try to identify plants/trees.
Gardening and cooking certainly go together.
Roller skating and dancing.
You get the idea.
Read/perform parts of plays or books with each of you taking a part. A classic example would be “Romeo and Juliet”.
I agree with the whole crafty thing. Before me and my flat mate moved in together we got a bunch of old shoe boxes (free) and some of those colour chart things you get from diy places (also free) oh and wall paper samples. We then went to the local pound shop and bought a bumper pack of glues. Each shoe box represented a different room that our flat was going to have. We used all the free samples of stuff to design what the flat was going to look like and I have to say that we kept it pretty close the the original design! Perhaps this exact idea wont be fun for you but something along the same lines might. We sure had a lot of fun for a few weeks!
We’ve been pretty busy lately, but have come up with a new project. We are planning on going to all of our favourite places in Montreal, up the mountain, the most amazing restaurant L’Academie , and certain parks, and attempt to take artistic/framable pictures to create a series of pictures to hang on our walls. We’re planning on moving soon, so it seems like a fun project, and a nice way to remember the city.
May I introduce you to the geeky exploit that is letterboxing? It combines stamp making with hiking, all the kids are doing it. The way it works is you download clues online (www.letterboxing.org) follow them to a spot where box is hidden in the woods. In the box is a stamp that you use to stamp your log and another logbook that you stamp with your individual stamp to show you were there.
And here are some more free shows coming up:
Montreal International Fireworks Competition (I prefer to watch from the Pied-du-Courant)
The Opéra de Montréal has one free open-air opera performance each year – watch for it.
Festival international Montréal en arts
Finally, dare I suggest that if you have a metro pass, you could always tour Canada’s longest art gallery.
What would you add to that with more money?
I like the beach, walks in the park, hiking, camping, volunteering.
Hmmm… I have half a mind to take up this hobby. Are you the only Doper that does it? We could start a Doper Letterboxing club!
I was going to suggest this. My wife and I do this sometimes, and it’s lots of fun.
There are probably some free or cheap plays and such being performed by local university students or community theatres too. It might not be Tony-Award-winning quality, but I always enjoy even bad plays if they’re done with enthusiasm and joy. I just saw a really bad play by a local community group, but they were having such fun that it was just sort of infectious.
Have a discussion about which of your friends, coworkers or acquaintances you would both be willing to swing with. You have to both like both members of the other couple. My husband and I have had years of fun with this conversation.