I'll start with tutorials
Tamriel Rebuilt offers many great tutorials and I find it the best site seeing as the CS wiki only looks at Oblivion modding now. I will list a few to get you started.
[url="http://www.tamriel-rebuilt.org/?p=modding_data/tuts/dsong/first_room"]Building your first room by Dragonsong[/url]
[url="http://www.tamriel-rebuilt.org/?p=modding_data/tuts/dsong/second_room"]Building your second room by Dragonsong[/url]
These are just two basic beginner tutorials. I will post more advanced tutorials in the future. eg; Scripting and dialogue.
Now onto resources
If you plan on uploading a mod to the internet you will need an archiver. I use [url="http://www.powerarchiver.com/"]Power Archiver[/url] but I will keep to my freeware promise and offer you all [url="http://www.zipgenius.it/eng/index.php"]Zipgenius[/url]. It does the same thing but unfortunately by the time I found it I had spent my money on PA and I was not going to put that to waste. Popular archiving methods are a plain old ZIP file for your small mod, RAR for your slightly bigger project and finally the most powerful 7Z for replacers and huge mods. Zipgenius supports all of these and can also make executables/installers for lightening fast installation. (Not recommended for small mods though.)
[url="http://sourceforge.net/project/showfiles.php?group_id=149157&package_id=170735"]Nifskope[/url] is extremely useful for quickly viewing models and editing them. Just open the file and you have the models in front of you. I use this when looking for resources to use in mods due to it's speed and ease of use.
[url="http://www.blender.org/"]Blender[/url] is a free and powerful 3D modelling program. To make models for Morrowind you will need the [url="http://sourceforge.net/project/showfiles.php?group_id=149157&package_id=166219"]NIF scripts[/url] and to run the program you need [url="http://www.python.org/"]python[/url]. It can be quite tricky to begin with but it starts to gradually make sense. Try reading [url="http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro"]Blender noob to pro[/url]. Blender cannot read DDS textures but will still accept them. They won't be rendered in the display window though.
Last night I also discovered [url="http://sketchup.google.com/"]Google Sketchup[/url]. It is much easier to use but to get your mesh into Morrowind you'll have to export it as a Google earth file, import into Blender then export as a NIF file. This can be awkward but Google supply a lot of [url="http://sketchup.google.com/tutorials.html"]video tutorials[/url] which will get you using the program very easily and it's easy to get the NIF out in the end. You can also select the scale depending on the system you've been brought up with.
[url="http://www.gimp.org/"]GIMP[/url], (GNU Image Manipulation Program) is a great program. It supports transparency and can export both TGA and Bitmaps and with the [url="http://nifelheim.dyndns.org/~cocidius/download.php?filename=gimp-dds-win32"]DDS plugin[/url] you can export DDS as well.
Another nice little utility is a thumbnail viewer for DDS and TGA files. These allow you to quickly see a texture without having to load up GIMP.
[url="http://developer.nvidia.com/object/dds_thumbnail_viewer.html"]DDS[/url]
[url="http://greggman.com/pages/thumbplug_tga.htm"]TGA[/url]
If you want to change original Bethesda models, textures or icons and you don't want to use the CS disc you can use a [url="http://planetelderscrolls.gamespy.com/View.php?view=Utilities.Detail&id=28"]BSA unpacker[/url]. This utility allows you to browse and extract from Bethesda Softworks archives.
That's all the utilities I can come up with right now. I'll have another look when I get home.
I will finish with a project.
[url="http://www.tamriel-rebuilt.org/"]Tamriel Rebuilt[/url] is a project to build the whole province of Morrowind for Morrowind and the whole of Tamriel for Oblivion. The devotion that goes into it is amazing and it is perfect for a first time modder. You will have to make a showcase to be let in but once that's out of the way you can claim any available work and put it up for review. I'm a member but I've only completed one claim. It's very satisfying to be part of a team and easier for those who aren't good with coming up with ideas and just want to build things.
That's all for now. I hope it helps otherwise that's a wasted hour. :laugh:
I'll post more when I get home.