TechCrowd is an all-purpose modpack that focuses mainly on tech mods, it's fairly light and currently has <60 mods. TechCrowd is built for multiplayer use but will work equally well for singleplayer.

It's recommended that you have prior experience with modded minecraft since some of the mods add a fair bit of complexity.

The changelog is maintained on Github and can be found here

Google sheet with descriptions and which TechCrowd version they were added in.

* This pack includes foamfix and betterfps.

* Make sure to at least dedicate 3GB of ram for this modpack.

Modlist:

Actually Additions (by Ellpeck)
Akashic Tome (by Vazkii)
Aroma1997Core (by Aroma1997)
Aroma1997s Dimensional World (by Aroma1997)
AutoRegLib (by Vazkii)
Baubles (by azanor)
Better Builder's Wands (by Portablejim)
BiblioCraft (by JDSinclair)
Biomes O' Plenty (by Glitchfiend)
Bookshelf (by darkh4x)
Brandon's Core (by brandon3055)
Chameleon (by jaquadro)
Chest Transporter (by CubeX2)
Chisel (by tterrag1098)
CoFH Core (by TeamCoFH)
CodeChicken Core 1.8.+ (by covers1624)
CodeChicken Lib 1.8.+ (by covers1624)
CompatLayer (by McJty)
CraftTweaker (by jaredlll08)
Dark Utilities (by darkh4x)
Draconic Evolution (by brandon3055)
Ender IO (by CrazyPants_MC)
Ender Storage 1.8.+ (by covers1624)
EnderCore (by tterrag1098)
Extra Utilities (by RWTema)
Extreme Reactors (by ZeroNoRyouki)
FTB Utilities (by FTB)
FTBLib (by FTB)
Fast Leaf Decay (by Olafskii)
GraveStone Mod (by EuhDawson)
Inventory Sorter (by cpw11)
Iron Backpacks (by gr8pefish)
Iron Chests (by progwml6)
JourneyMap (by techbrew)
Just Enough Items (JEI) (by mezz)
Just Enough Resources (JER) (by Way2muchnoise)
MCMultiPart (by amadornes)
Mantle (by mDiyo)
McJtyLib (by McJty)
Mob Grinding Utils (by Vadis365)
Mod Name Tooltip (by mezz)
Morph-o-Tool (by Vazkii)
Morpheus (by Quetzi)
OpenComputers (by SangarWasTaken)
Quark (by Vazkii)
RFTools (by McJty)
RFTools Control (by McJty)
RFTools Dimensions (by McJty)
Ranged Pumps (by raoulvdberge)
Refined Storage (by raoulvdberge)
Simply Jetpacks 2 (by Tomson124)
Steve's Carts Reborn (by modmuss50)
Storage Drawers (by jaquadro)
TOP Addons (by DrManganese)
The One Probe (by McJty)
Thermal Expansion (by TeamCoFH)
Thermal Foundation (by TeamCoFH)
Tinkers Construct (by mDiyo)
ZeroCore (by ZeroNoRyouki)