Applied Energistics is a Minecraft Mod which contains some basic tools, some electric tools, and an advanced storage system called ME that lets you store items compactly, and in the way you want.
Applied Energistics - ME Networks provide:
Simple but robust automation tools, and great support for working with other other automation mods.
Includes a system which lets you create and use an automated crafting system.
Ways to include other storage from other mods or the vanilla game.
Lets you monitor your storage and trigger things via redstone.
Ways to alter your setup on redstone signal.
Save yourself a little time with wireless storage access.
Modular Force Field System is a Minecraft mod that brings in modular force fields into Minecraft. Ever tired of nuclear explosions blowing up your house or want to prevent people from entering your secret bases? MFFS is the mod for you!
Thermal Expansion, at its core, is a 'tech' mod - it's a mod of what ifs. For example, what if you could turn water into ice or snow with a machine? Or how about a machine that could combine lava and water however you choose? What if there were a wool that didn't burn? Or, what if you could set up advanced yet extremely compact production chains that didn't require redstone engines or complex pipe routing? If any of that interests you, then you may want to check this out.
ExtrabiomesXL is a mod for Minecraft which adds new biomes that enhance game play and make exploring fun and interesting. ExtrabiomesXL is a collaborative open source project based on MisterFiber's original idea and mod.
Tweaks your inventory handling to be more intuitive. Break your iron sword in the heat of battle and don't have time to replace it? No worries, if you have another one handy in your inventory it will automatically be moved into the last slot it was used! Works with all stacked items!
A way to automatically farm plants and animals, as well some new rail tracks! With this mod you can set up a completely automated farm for any of these things that requires no real work aside from collecting the harvests and reloading the planter, without incredibly complex and unwieldy water/piston solutions. And you can milk cows to death or otherwise run livestock farms if you need those resources. Oh and it has conveyor belts too.
NEI is a successor to both Too Many Items and Recipe Book. It arose around the same time as Craft Guide when Alexandria and a few others on the IRC suggested that I merge both Too Many Items and Recipe Book to remove their greatest flaws, ironically too many items, or in the case of recipe book, too many recipies. Too Many Items was great, but the one thing it lacked was an easy way to search and sort your items. When you had a mod like Red Power coming along with 10000 items both TMI and Recipe Book were racking up the pages. Even if you don't want to use NEI for cheating in items, you will likely feel right at home with the Recipe component of the mod.
Electricity generation is always a heavy burden. That's why we are here to bring in high tech nuclear power to solve all your electricity deficiency problems. With our fission reactors, fusion reactors, antimatter generators and thorium power, you won't be short of electricity ever again! Note that this mod is still in alpha stage so documentation on items are not done properly.
ICBM is a Minecraft Mod that introduces intercontinental ballistic missiles to Minecraft. But the fun doesn't end there! This mod also features many different explosives, missiles and machines classified in three different tiers. If strategic warfare, carefully coordinated airstrikes, messing with matter and general destruction are up your alley, then this mod is for you!
Mekanism brings 5 new sets of tools and armor, a new types of tools and weapons, more explosives, magic items, weather and time control, powerful machines, a new kind of bow and arrow, lightning rods, and a few other features into Minecraft. Even better, it's open source.
MachineMuse’s Modular Powersuits is a mod based around the idea of an inventor who tinkers with high-tech electronics and makes a suit of powered armor chock-full of useful gadgets and features. Inspired by heroes like Iron Man, Megaman, and Samus Aran, as well as by the high-tech armor in other mods like EE2 and IC2.