Can anyone link me some cool shortsword/dagger mods?

There are hundreds, if not thousands. Search the Nexus.

I know, and that is the problem. I wish "cool" and "best" were not so subject (at times) because then there would be a list of the top 100 or something, such that I could actually look through the "best" in a feasible amount of time...

I have been, yet to find any. The search range is way too broad. That's why I made this, to see people's favorites.

I suggest you try weapon section at nexus. Vagabond angel's trottlekitties, trollf, starX, Nocoroshi among my favorite modders. But, then there are few thousands more there.

Here are a few I found just browsing the Nexus. Enjoy

Daggers:

• http://tesnexus.com/downloads/file.php?id=27852 / http://tesnexus.com/downloads/file.php?id=30604 - Cool looking.
  
• http://tesnexus.com/downloads/file.php?id=6836 - Self-explanatory.
  
• http://tesnexus.com/downloads/file.php?id=6228 - I haven't tried it, but it looks pretty cool.
  
• http://tesnexus.com/downloads/file.php?id=13986 - A collection of (mostly) vanilla daggers held upside-down for a more 'assassin' feel.

Shortswords:

• http://tesnexus.com/downloads/file.php?id=15518 - Nepalese 'kukri' swords. Stupidly overpowered in-game, though - might want to tone it down with the CS.
  
• http://tesnexus.com/downloads/file.php?id=31744 - Not precisely what you're looking for, but sort of 'in-between' a shortsword and a longsword.

Compilations:

• http://tesnexus.com/downloads/file.php?id=13884 - Recoloured / edited vanilla weapons - lots of them. Also, armour. Lots of daggers, shortswords, wakizashi and the like.

Others:

http://tesnexus.com/downloads/file.php?id=30396 - Mostly longer blades, but some might fit your criteria - the double-sided dagger, for example...
http://tesnexus.com/downloads/file.php?id=23393 - Again, long blades, but scimitars are classy, haha.
http://www.tesnexus.com/downloads/file.php?id=17748 - Hand-held close combat weapons. Sort of like daggers. Maybe.

Edit: added a link.

Cool, thanks.

Looks really nice. Missed those. Thanks for the links.

Top-grade 'stabbing-people-implements' ;O

I don't have access to my Oblivion PC atm, so I compiled it for my own benefit for when I get back as well. So don't go and think I'm too altruistic xD