This is a list of  tools that I’m using and are freely available. Maybe you can use certain pieces of it.
Several are completely free and / or open source, a few the more limited free editions, but still very useful.

For creative stuff:

A free, open source, 3D creation tool. It can also be used as a video editor. It does take some time to learn, but there are several websites that have free online lessons.
BlenderGuru and BlenderCookie are two that I’ve used and enjoyed.

Godot game engine
Marvelous free, open source, game engine. It has lots of nice features, 2D, 3D, nice scripting, Many exporting options including windows, linux, mac, android, html5.
It’s fairly new, but lately getting a lot of traction, good tutorials.

A little, free, open source code editor for the web. I think it is good because it has some code completion and the possibility to open any directory to work in.

Netbeans IDE
A bigger, better, cross-platform, free code editor for the web. I use this one for bigger projects.

Another code editor

The GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring.
Since version 2.8 you can put the software in single-window mode, which I recommend. That makes it more comfortable to work with I think.
The setting is under windows in the main menu.

Very nice pixel program. Good workflow to get things rapidly done, you can just drag other images into an image, import as layers, very pleasant, but do not save jpeg’s with it, use png’s if you need an export for the web or other programs.
Use gimp in stead for jpeg export if necessary, it’s way better. Krita always adds some blur with the jpeg’s.

GREYC’s Magic for Image Computing. Full-featured open-source framework for image processing, comes as a Gimp plugin, it has lots of wonderful image filters.

A free vector drawing program.

For sound file editing.

Music creation software, free for the desktop.

Hitfilm express
Free version of Hitfilm, pro video editing software.

Open Broadcaster Software
Free open source screen capture software.

Subversion Edge
a free subversion server

TEncoder Video Converter
Free open source video conversion software. (GUI for FFMpeg, MEncoder and MPlayer)

Android virtual machines in conjunction with Virtualbox, free for personal use, wonderful tool. You can download various phone model images after installing Virtualbox and Genymotion.

For sysadmin/maintenance things on windows:

Burnaware free
Disc burning software. I use it to create iso files from a cd,dvd,.. disk. (copy to Image button on the front page)

Virtual Clonedrive
Software to mount images under windows.

EaseUS Partition Master Free
A free windows partition manager. Very nice tool. I’ve used it to resize windows system partitions.

Hiren’s boot cd
A bootable cd with a lot of tools. I have mainly used it to reset windows passwords.

For doing this: choose mini windows xp on the boot menu,  hbcd menu on the desktop and then it’s under programs > passwords / keys > windows login > NTPVEdit
or Offline NT/2000/Xp/Vista/7 password changer from the main menu. Some extra googling / registry editing may be necessary.

Making backups is important I think. When you run linux there is rsync, but for windows you can use this free tool for folder comparison and synchronization to other disks for backup.

Rufus or unetbootin (multiplatform)
To create a bootable usb drive from an ISO image.

Create images from sd cards (press read) or move an image to an sd card (press write).

Bulk Rename Utility
Very nice tool for batch renaming filenames.
To replace a certain part of the filename use the Replace (3) boxes. You can get a preview of the changes the program will make.
It’s free for personal use.

Grep on windows

grep -R “text you search” .

Linux mint
Nice distribution I recommend for everyone to try. It’s the most easy linux to get started with I think. Pretty good hardware recognition. With this you can transform older computers into stable, very usable machines again, in stead of having to buy new hardware.

Cross platform:
File synchronisation application to bring multiple directories, on different locations, in sync. Works really well.