I have decided to document some of the projects that I had been working on to some extent but gave up on at some point.
I'll explain what I had in mind and why I stopped. I might still want to get some of them done one day, drop me a word if you're interested in them in any way.
Depending on the context some of them are probably going to be described either in english or in french. I plan to add more of them over time.

I suggest Idlesoft's Cybercemetary as a soundtrack to read this page :

Bad manuals

Around 2006 I started to write tiny books about methods to produce bad pieces of art (bad music, bad drawing, etc)
I think one of the actual goals was to propose counter-intuitive methods that could lead to interesting results, but it was difficult to phrase them in a way that wouldn't read as "this is everything you should not do".
Of course "badness" is a subjective measure and a lot of the "bad" things that we love weren't made that way on purpose.
I own one of the existing books about bad photography (the one by Thomas Lélu). I like the fact that it only features lost-and-found photographs (classified and annotated), some of them are very nice.

Applied math book

Most math textbooks for children offer exercises with a very simplistic context (e.g. "Tom has three apples, Susie steals two apples from Tom, how many apples does Tom have now?" (the answer is "one")).
I wanted to expand on that idea in a transversal way, as the textbook goes on and the problems get increasingly difficult, the characters also grow up.
Tom never forgot those few apples that Susie stole from him when he was young and that led to complex stories of jealousy and revenge.
I wrote a few math problems for this book but it turned out to be more difficult than I thought, I'm probably not skilled enough at math and/or storytelling.
Also another related project would be to write math songs (like those children songs used to remember times tables and stuff) but this time for badass math theorems.

Photo-novel with adjustable happiness

This project was about an interactive five-boxes photo-novel strip.
The reader could use an interface to control if the mood was going up or down at each box.

Each box would have two possible children boxes (positive and negative) and so on.
That means 2^4=16 possible states for the entire strip and a total of 16+8+4+2+1=31 different panels.
In 2006, I drew a branching graph on paper with a basic scenario.

Then this paper was lost, when I found it again years later I couldn't remember exactly what those sentences mean (most of them implied a kind of joke).
I remember having developed a small web interface for it but I never took the pictures.

Of mice and oysters

This was a prototype for a board game that we made with my friend Léo Mathieu.
This idea was to split the game into two phases, one of it was about tile-building (think of Carcassone) and the other was an asymmetrical two teams race in the previously built maze to gather resources.
It takes place in the sewers, each tile is a piece of pipe that has water and concrete. The rat team could only walk on concrete while the oyster team could only move in water.

In order to balance the tile distribution I had to build a software that would play many games in a raw.

I stopped working on this at some point because I needed people to play the game in order to fix and fine-tune it.

Bit percentage

This is one of my most simplistic yet actually tricky project.
I wanted to make a software that would simply say how much of a computer file is or isn't (think of 1 as "being", and 0 as "not being").
I got it somehow working but it was taking too much time for large files.

Social play

I made several attempts at writing plays using unedited comments from social networks.
I started this before social networks were even really a thing, there was only chat clients and I had been using them to copy/paste sentences from one user to another and kept their answers as-is as a list.
The result wasn't that interesting, most of the time my interlocutor was just wondering why I would say such an out-of-nowhere thing.
Then I tried to make something else a few years later by picking specific unrelated posts from friends on Facebook and write a small play with them (each character was the actual person who wrote a given comment)
I managed to put together a few slightly consistent sketches about weather, work, chilling out, or growing a beard... But nothing that convincing.