I heard about the mini sftp from h http://www.coreftp.com/server/to make your own network assisted storage (a networkdrive) with FreeNAS or company cloudservices(but be carefull about the Data-safety here!) http://www.freenas.org/
nearly all operating systems offer a inbuild version but as soon as you
need to cross borders you want to choose something different: Be aware by
using non opensource tools for remote control you grant the company access
to the pc you are controlling, so its all a question of trust!
VNC for remote controlling is the tool of the trade!
One trick here is to use dyndns (http://www.dyndns.com/) if the PC changes ip adress but all our PC's don't!
For private use teamviewer is nice. Th definition from teamviewer is “whatever you do not get payed for”. So some short remote help this might be a nice choice
For windows there is another tools without installation
Instant screen sharing offers some fast way to look on the screen (no control)
For teachers there is a nice little tool that allows the control of the other pc's in the system and allows screen sharing.
One of the classical tools is Putty
I stumbled recently over one alternative that seems better in many ways
I create small webpages with partners to communicate information. This
works like a mini wiki and is free with a google account.http://www.google.com/sites/index.html
important is here to back up yours sites from time to time (you never know when google asks money for it) for this
http://code.google.com/p/google-sites-liberation/ is extremly helpful
for sorting your mind a small wiki on your pc is helpful
for more projects you should choose the right platform here http://www.wikimatrix.org/
Little tool to make online surveys for free (maybe for course feedbacks
and similar things) http://www.surveymonkey.com/
Tool that downloads the whole webpage (including all subpages) for local
Little tool to share a white board online, no installation works in
browser, just share the address for a specific board http://cosketch.com/
Little tool to make scheduling for meetings easy: http://www.doodle.com/
Little webpage that removes banners and other things from other webpages for better printing http://www.printwhatyoulike.com/
Simple QR codes can easily be generated using freely available online tools like:QR Monkey https://www.qrcode-monkey.com/ or QR code generator http://www.qr-code-generator.com/
For more options
I you already use Inkscape (see 2 plotting and poster) the function is
build in Extensions > Render > Barcode > QR Code
a small freeware tool like the portable QR code generator (in german!) https://sites.google.com/site/qrcodeforwn/ is very useful.
Interesting is also this tool (free for personal use only) since it can bind in logos in the code https://qrc-designer.de/?p=home&hl=en
There is a whole community creating so called Halftone QR codes that combine pictures with QR codes and that I find very interesting, see for example this project page for more info https://github.com/fangj/Halftone-QRCode-Generator
For some you need to download and install: http://eduroamclient.srv.lu.se/Eduroam.zip
(works only from university network! So use the vpn from before) LDC
gives instructions for the installation here: https://support.comaround.se/content/guide/textGuide.aspx?guideID=139166