Here are some (current/active) software contributions:

I'm SableVM Contribuitor:
a free and open source Java Virtual Machine

I'm member of BSD Certification group.

I'm member and foundator of the NetBSD-BR .
The Brazilian NetBSD users group
(page content in pt_BR)

I'm member of OpenSolaris-BR group.
The Brazilian OpenSolaris users group
(page content in pt_BR)