I know there's probably software out there that does some of this, but I just thought I would share a couple of python scripts I've written to automate a few things. I wrote these while teaching myself python(the only language other than html I'm familiar with) and they've worked out pretty good for me. Also keep in mind that none of these have GUIs so you need to run them in the command line with "python filename.py".
1) OGG to AVI Video Converter
This is just a script that I wrote to avoid typing an annoyingly long string every time I wanted to convert videos. I marked the line that actually does the conversion with a comment so you can modify it to change the input and output formats to fit your needs. This script requires mencoder. (Since mencoder is available for Windows, this script could probably be easily modified to work in Windows)
Here is the source-code
2) DVD to ISO Converter
Most newer distributions allow you to to just "Right click, Copy to, Image" and you can back up your DVDs. For some reason though I've had this script succeed on occasions that Brasero or K3b failed. Also might be handy if you're in a CLI only environment.
Here's the source-code
3) MountISO
I wrote this one way back in the day before I discovered gmount-iso. I know that nowadays Gnome supports mounting ISOs with Nautilus but I still prefer this script because for some reason the path Gnome mounts ISOs to is not readable by VLC(It's really long and has weird characters). This was my first attempt at packaging a program and linking multiple scripts to one another to accomplish a task. I even made a little bash installer and everything that just copies the files in the archive to a location on your hard drive(/opt/mountiso). The software is totally usable without running the installer, just run the "mountiso.py" file with python. All the files in the archive are in their original text format so feel free to take a look at the source code.
Here's the source-code