As a late-comer to the open-source community, 2013 marked the year that I am exposed to and captivated by the open-source culture. Here are the open-source projects I am involved in in 2013.
Generic SIMD intrinsics library
Why does SIMD intrinsics have to be non-portable? This open source library defines a set of generic SIMD intrinsics based on common C++ operators and allows one to write portable SIMD intrinsics codes.
V8 for PowerPC
This open-source project added the PowerPC backend to V8 (in the process of merging to the main branch of V8). For the first time, V8 runs on PowerPC.
Any research community focusing on performance cannot thrive without a good set of benchmarks. The R community, with no lack of projects aiming at improving R performance, lacks good benchmarks. This open-source project intends to be the hub of good benchmarks and benchmarking for the R community.