Ever since JeffPeng started making theJMOD tool for Survival Industry, I'd been working to isolate the different features into their own mini-mods, so anyone can use them. The JMOD Collection is the result.
Vanilla Ingot Works
This is a very simple, close-to-vanilla method of ore doubling and alloying. By creating a crucible (a fired clay cup) and a sand mold, you can smelt ores and make alloys two ingots at a time in the vanilla crafting table and furnace. A good mod for a vanilla-themed pack.
Many mods support specific ores that they don't produce themselves, usually through use of the Ore Dictionary. For example, copper, tin, and silver. However, the mods that make these metals available either don't make them all available, don't have tools or armor for them, or whose tools/equipment isn't compatible with other tool mods (Thermal Foundation).
Common Ores is pretty simple.
It provides metals for Copper, Tin, Aluminum, Nickel, Silver, Platinum, Lead, Bronze, and Electrum
For all metals, the ingot and metal block forms are included.
For non-alloys, ore blocks are included. Ore generation is included in the mini-mod.
For Flint, Copper, Aluminum, Bronze, Nickel, Silver, Platinum, and Electrum, all the major tools (sword, axe, pick, hoe, and shovel) are provided.
For Copper, Aluminum, Bronze, Nickel, Silver, Platinum, and Electrum, a full set of armor is made for each.
For Lead, the mod includes a lead pipe that does very nasty damage (better than a diamond sword!), but doesn't last long (somewhere between wood and stone).
If the Chisel mod is installed, then the mod makes chisels for Flint, Copper, Aluminum, Nickel, Bronze, and Platinum.
The alloys are not accessible by this mod alone; If you don't have another mod that supplies alloying, then Vanilla Ingot Works is recommended.
This mod will take all vanilla tools (as well as those added by Common Ores), and add "repair recipes" to the crafting table and anvil. In addition, tools will not disappear when they break; they will simply stop working.
Enchantment Technology ("EnchanTech")
This is a couple recipes, a bunch of textures, and a language file (en_US only at this time) that transforms the enchantment system of Minecraft into the more tech-themed "modification system." Great for modpacks that have a technical theme.
A few dyes in vanilla Minecraft have issues with being modded. Ink sacs, bonemeal and lapis lazuli have an obvious source, and would not fit being dropped from anything else. Bonemeal and Cocoa beans have multiple uses. Bonemeal in particular can't be farmed without unbalancing farming in general. Cactus green is used by several mods as a way to seal leaks (for example, Buildcraft's liquid pipes).
Just Dyes is a mini-mod that provides alternatives to the vanilla black, white, blue, green, and brown dyes that simply function as dyes, nothing else. They are completely neutral, so they can be crafted from any source without raising an eyebrow.
Simple Wooden Bucket
There is another wooden bucket mod out there, but it requires cactus green... something that is hard to come by without another dye mod or access to a desert. It is also licensed, so that it cannot be changed by third parties. The Simple Wooden Bucket mod is an alternative. It is very limited compared to other early-bucket mods, as it can only hold water or milk, but it only requires wood.
This is the most complex of the mods on this page. Moh's Mining is a total conversion for vanilla mining. Instead of wood -> stone -> iron -> diamond, it expands the mining progression and rearranges it in order of the Moh's hardness scale. The new progression is wood, stone, aluminum, copper, platinum (or bronze), iron or nickel, obsidian, and diamond. It also has both Tool Repair and Common Ores built-in, so it cannot be installed alongside them. Vanilla Ingot Works is not included with this mod, so you might want to include it, as it allows you to make electrum and bronze.
And yes, obsidian tools and armor are included.
To just download the mods, just go to the appropriate folder in the Github, and download the .jmod file. If you want to tweak it, just unzip it, edit the files, zip it back up, change the .zip to .jmod, and you're good to go.
These mods are licensed under the LGPL, so you can (and are encouraged to) alter them to fit your needs. If you want to help improve them for everyone, feel free to fork a copy for yourself, and by all means, submit any improvements to make them that much better!
As for modpacks, feel free to use them as you will. If you include it in your modpack, and tell me about it, I'd be pleased (mainly because it feeds my ego), but there's no requirements, as long as you remember to share the love.