Electromine

It is an old modpack containing various sci-fi minecraft mods. For example Tinkers construct, allowing the player to customize their tools from various combinations including new materials and alloys, Mekanism and Minefactory, both mods containing various machines that make minecraft life generaly easier and allow players to build a lot of various farms, Biomes O Plenty, for the people that got bored by default world generation or Galacticraft, my personal favourite, that allows player to explore the solar system and live beyond the border of the Earth. It combines the nostalgy of old minecraft version with bunch of new stuff. I liked the way it predicted lots of things that were later added to minecraft, for example copper blocks, bamboo and so on. I hope you will enjoy it just as I did.