Everything what script is doing it’s looking into hero mansion. It shows current exp, experience needed for the next lvl and how much exp is still needed for the next level.

Install the script

Popularity: 10% [?]

The amount of the script features is very impressive. It’s very useful. I can say it by my own experience. Download it here. Remember, you need greasemonkey script engine for firefox to use it.
Quick Target Features

Quick Scout - sends scouts to village (configurable)
Quick Fake - sends fake to village (configurable)
Quick Farm - farms village on [...]

Popularity: 62% [?]

There is a script for travian, called Travial Village Center Numbers. It is already third version out there and it worth to check out, cuz it slightly change graphic interface and show building lvls right on the village picture.
Check it out on the userscript site.
Script features list:

Window support
Background color green if building level = [...]

Popularity: 27% [?]