Cacheonix is licensed under the LGPL v2.1. The LGPL is sufficiently flexible to allow the use of Cacheonix in both Open Source and commercial projects. The LGPL guarantees that Cacheonix and any modifications made to Cacheonix will stay Open Source, protecting our and your work. Anyone who wanted to release Cacheonix under a different license would have to obtain permission from people who have contributed code to Cacheonix. Cacheonix is and will be Open Source distributed under the LGPL.
The use of the unmodified Cacheonix binary of course never affects the license of your application or distribution. You will never have to pay money to any commercial entity for using or integrating Cacheonix.