This mod allows skills improvement (One-Handed, Two-Handed, Marksman and Destruction) by practising on Combat Dummies.
You can use every dummies you can see on the picture (behind Companion's headquarter in Whiterun, behind the Riften's castle, etc...)

Functionalities :

The higher the skill level is, the longer it takes to improve the skill.
There is a 6, 12, 24 hours or no limit on the amount of XP the skill will get. Below 25 in your skill level, the skill can raise for around 1 lvl, 3/4 below 50, 1/2 below 75 and 1/4 below 100.
Each skill can be trained separately.

Tips :

You can change your time limit with this command in the console ² :
- set TDMustChoose to 1

Next :

- Allow to train with NPCs

Releases Notes :

V0.5
- Add a new setting to change how many hours you must wait to pursue your training.
- Improve Archery now a little bit faster

V0.4
- Fix : there is now one limit message per skills rather than just one message...
- Archery targets added (You can only train Destruction and Archery on it)
- Missing dummies added

V0.3
- The Issue in Destruction has been fixed (no more allowed to win XP with channeled spells after reaching the limit with direct spells)
- There is now only one message to warn you that you've learned enough, but it pauses the game, so you can see it easily.
- Add choice to limit or not each day the amount of XP you can win

V0.2
- The script has been revamped and optimized. Runs a lot faster
- Destruction works !
- Many bugs fixed

Links :

Skyrim Nexus : http://skyrim.nexusmods.com/downloads/file.php?id=12395
Italian Mod (thanks to Andrea) : http://skyrim.nexusmods.com/downloads/file.php?id=13289
French Mod : http://steamcommunity.com/sharedfiles/filedetails/?id=15368
English Mod : http://steamcommunity.com/sharedfiles/filedetails/?id=15394

Thanks for your comments and suggestions !