I'm working on something similar for Android but focused on note taking and diagramming instead of drawing. I think of it as a kind of handwritten wiki. I allow placing of links in the document that jump to other parts of the document. It is still very much a work in progress and my lines don't look anywhere near as good as the ones in Sketchology.
Not related to finance, but for people who enjoy Ledger and need a calendar application, there is remind[1] which works a lot like Ledger. I just have remind run from my bashrc to print out my reminders at the top of every new terminal. It works great for me.
Edit:
Looking at it again, some of the programming related symbol keys are in slightly strange positions and would require some relearning. Plus the right shift is tiny.
I'm guessing there is a lot of data that never gets sent to earth. Do they send thumbnails of the images to determine what is interesting? Is there a software tool available that creates a thumbnail and then creates a copy of the original image that is dependent on the thumbnail to be recreated. If you can't tell I wasn't really sure how to word that last sentence. Basically, less data would be required to transmit because you are only sending the data required to reconstitute the real image. Depending on the size of the thumbnail this might result in a negligible difference.
For example, a very naive implementation might create a thumbnail from every pixel where x or y is odd and then when/if you want the original image you can get the data required to put the image back together (it would be a similar sized thumbnail but with the even pixels) For this naive approach the thumbnail would likely be much larger than you want and would not help at all :)
I've been using Caps Lock as Escape for an easy to access escape in vim. I am so used to this now that it is one of the first things I have to change when setting up a machine before I go crazy.
I'm also in the US and I can see carriers removing this feature. I guess when I say standard android build I mean before the carriers mess with it. I feel pretty safe with the nexus one.
It is free. I just thought it would be a fun experiment while learning the android SDK. It ended up being more difficult than I thought it would due to how the camera preview works. There doesn't seem to be any way of getting the camera preview without displaying it on a SurfaceView. The only way I could figure out how to get it to work was to put a View on top of it to draw the edge image on. I also tried making the View I draw on top a SurfaceView which allows for more control of when you update the view but you can only have one and for some reason that I don't understand I only ever saw the camera preview when trying this.
The algorithm itself is just the most basic edge detection algorithm I could find: http://en.wikipedia.org/wiki/Edge_detection#Other_first-orde...
I'm not entirely sure if that is what you were asking. It just requires the android NDK and SDK to build it. The source is at http://github.com/bwr/edgefinder
Self promotion: "Edge Finder" applies an edge detection algorithm on the camera preview. Falls into the useless (but neat in my opinion) category.
Also source is available :)
I'm working on something similar for Android but focused on note taking and diagramming instead of drawing. I think of it as a kind of handwritten wiki. I allow placing of links in the document that jump to other parts of the document. It is still very much a work in progress and my lines don't look anywhere near as good as the ones in Sketchology.