General:
* Kit
* Set
* Collection
* Arsenal
* Repertoire
* Inventory
* Resource
* Assortment
* Cache
More specific:
* Toolbox (for tools)
* First aid kit (for medical supplies)
* Survival kit (for emergency supplies)
* Software suite (for software programs)
* Skillset (for abilities and knowledge)
* Framework (for a set of guidelines or principles)
* Methodology (for a systematic approach)
The best alternative will depend on the specific meaning you're trying to convey.