So I was dwelling some forums and came across this:

http://meegoforum.pl/powerpack-t466.html

It's in Polish, but in short, a user of that forum called arcean prepared a power pack for pr1.3. The first post of that thread has a sort of a changelog (in English!) of what it's supposed to bring to our N9's. Have anybody seen/tested this before?

If not, what you have to do to get it is:

- first make sure you have inception/open mode installed

- download this package http://meegoforum.pl//download/PowerPack_0.0.3.zip

- copy it on N9 to folder /home/user/MyDocs/PowerPack

- in case of inception, run the following command in terminal:

cd /home/user/MyDocs/PowerPack
/usr/sbin/incept *.deb
Password for 'root':

- in case of open mode, run the following:

devel-su
#give root password
export AEGIS_FIXED_ORIGIN=com.nokia.maemo
cd /home/user/MyDocs/PPack
dpkg -i *.deb

Installation instructions come directly from the first link and were made by the author of this package (arcean). I did not install it yet, because I modded my phone heavily with N9Quick Tweak and I'm not sure how those two would work together. From user reports it seems it works OK and brings some improvements for apps using qt-components. Also, some people had to reflash phone after installation :/ but presumably due to installation errors on the user's end. Anyhow, just reporting what I've found

EDIT: minor edits

Moderator edit (18-07-2013):
Newest version: PowerPack 0.3.0