In total there are 9 luggables which I see divided into 3 categories:
There's the ones that appear randomly in the world and can be found using the Detect Luggable ability in the Data Miner tree. These include:
- LED Black Box
- N30 Frag
- Bomb Pet
There's the ones that appear as loot from the data node spawns so you will need the Data Miner tree loaded. These include:
- Portable Signal Booster
- Quicksilver Compilation Module
- Decompiler Overdrive Module
- Code Optimizer
More information about these here.
And then there's the ones that appear randomly during a specific event. These include:
- Mobile Snowman - Winter Holiday
- Smith Virus Virion - Second Anniversary (probably won't be seen again)