Open source software is free an available for everyone. This is the main reason for the most people to use open source software. Download eyeUNIFY for free and pay only the support you need (or not).
Open source software goes with the motto “security with transparency”. Since everyone can see through the code, security issues can be found much faster.
You need additional function in a software? Simply implement it! With open source software you can make use of new opportunities arising with source open to anyone.