Open Source Software can be great. TechCruch lists 5 fairly new open source technologies for big data.
This is probably a good list to pay attention to for the near future.
- Storm
- Drill
- R
- Gremlin
- SAP Hana
If you are unfamiliar with some of software on the list, please read the article for more details.
Big Data Right Now: Five Trendy Open Source Technologies | TechCrunch.