[selamtux]

You can delevop new softwares like cloud management (aws or/and google compute engine) or really working docker management ui, or something similar.

Or flash to html5 converter (convert all games example)

So you have keep eye on technical changes around the world.

Also softwares reaaly depending local env. Yes maybe photoshop or ms office is big products bu these is lot of local area to develop new apps. (When i said local think as countrys) for doing that you must travel the world.