Yes, I know and like OSM2go. I used to use it on my N900. It's very nice and efficient to edit OSM data. Almost all my (tiny) contributions were done with OSM2go.

I would be very interested in having it on my Jolla also, and I may contribute for a Sailfish port, but before doing it, I'm concerned about the touch screen precision of the Jolla compared to the N900 one. In my opinion, OSM2go is nice to use with a stylus (especially to adjust handle positions in a track), the stylus is pixel precise and don't hide what you're doing. On the contrary, with a finger touch screen, it seems to me that it's hard to adjust positions up to pixel precision and usually fingers hide what we're moving. For instance, I've always troubles to place the cursor where I want in a text field to edit a speling mistake.

So I would be eager to port OSM2go to Sailfish, but currently I have no idea how to tackle the "adjust position of your track handles" issue. Maybe someone can correct me if I'm wrong or have a brilliant idea, I would be happy to try to implement it.

If we can find a solution for the usability issue on finger touch screens, I'll collaborate with them to have a Sailfish compatible version of OSM2go, yes.