I've been involved in many open source projects over time.
The most prominent one is Kannel, the open source SMS/Wap Gateway. My contributions to Kannel are especially the rewrite of the AT driver module and the delivery report module.
I recently worked on getting the Cocoa port named Cocotron to work natively under Linux. The results are here http://cocotron.fink.org
Some other useful tools I've made a nice installer for MacOS X 10.9
this is a binary compilation straight of the OpenSSL sources. it is a merged version for i386 and x86_64 and it does have sctp and shared enabled.
mysql and postgres client libraries working under i386 and x86_64 and install under /usr/local/mysqlclient resp. /usr/local/postgresclient. Useful for fat binary developments as the default only comes for one architecture.
libraries installing under /usr/local for i386 and x86_64
SCTP_Maveriks_201403150229.pkg
SCTP_MountainLion_201309070228.pkg
SCTP for Maveriks (OS X 10.9), MoutainLion (OS X 10.8), Lion (OS X 10.7) and OS X 10.6.
Run /Library/StartupItems/SCTP/SCTP PrepareSDK once to copy the header and library files into the Xcode SDK folders. run /Library/StartupItems/SCTP/SCTP FirstStart once to prepare the SDK and start it.