This pack was designed to be playable on all computers (even older ones). It contains a good basic set of the essential tech mods with some fun stuff thrown in like hats, morph, as well as carpenters blocks and chisel to add design options.

Modlist:

Waila (by ProfMobius)
JourneyMap (by techbrew)
CodeChickenCore (by chicken_bones)
NotEnoughItems (by chicken_bones)
Inventory Tweaks (by Kobata)
BiblioCraft (by JDSinclair)
CoFH Core (by TeamCoFH)
Thermal Foundation (by TeamCoFH)
Thermal Expansion (by TeamCoFH)
Applied Energistics 2 (by AlgorithmX2)
Extra Utilities (by RWTema)
Waila Harvestability (by squeek502)
Carpenter's Blocks (by Syntaxial)
Thermal Dynamics (by TeamCoFH)
Storage Drawers (by jaquadro)
Iron Chests (by progwml6)
OpenModsLib (by OpenMods)
OpenBlocks (by OpenMods)
EnderCore (by tterrag1098)
Ender IO (by CrazyPants_MC)
Redstone Arsenal (by TeamCoFH)
Dense Ores (by RWTema)
Steve's Workshop (by Vswe)
Buildcraft (by CovertJaguar)
MrTJPCore (by Mr_TJP)
Forge Multi Part (by chicken_bones)
Project Red - Base (by Mr_TJP)
Project Red - Integration (by Mr_TJP)
Project Red - Compat (by Mr_TJP)
iChunUtil (by iChun)
Hats (by iChun)
Baubles (by azanor)
Morpheus (by quetzi)
McJtyLib (by McJty)
RFTools (by McJty)
Wawla - What Are We Looking At (by darkh4x)
FastLeafDecay (by Olafskii)
Steve's Factory Manager (by Vswe)
Morph (by iChun)
Buildcraft Compat (by buildcraftchildsplay)
Chisel (by tterrag1098)
Storage Drawers: Misc Pack (by jaquadro)
ExtrabiomesXL (by Annysia)
Iron Backpacks (by gr8pefish)
Calculator (by Ollie_Lansdell)
Baublelicious (by UnwrittenFun)
BiblioCraft: BiblioWoods ExtraBiomesXL Edition (by JDSinclair)
Iron Tanks (by Indemnity83)

Lyrida's Lite Pack