I'm using the Vim plugin in Eclipse, and only thing that would make me more happy would be if I could somehow measure distance from current line to all other lines. It is kinda hard to guess exact number of lines i.e. is that 8 or 9 lines I need to move down? So some kind of modification of the line numbering bar that changes the numbers to be relative (+-) to the current line would be nice to have.
Is there something like this? If not I'm so desperate that I will probably try to build it myself.
Standalone vim has the relativenumber option in version 7.3 that does what you want. I don't know how closely related that is to the eclipse plugin, or how difficult it would be to port over.
Before that option was available, I used to make heavy use of marks instead of guessing relative line numbers. Basically, you mark a line with m followed by a letter of the alphabet, and can move to that line with ' followed by the same letter. Maybe that will help if you don't already know about it.