Sage
This self-replicating program written in 332 Mb1 (or 1/14th the size of Google’s codebase) was activated by invoking its “run” procedure: viz., the application of carbon-dioxide, water and photons.
All the code I’ve written (or will write) approaches not the majesty of this seedling: this imperfect quine approximating self-copies.
Footnotes:
1
Prabin Bajgain et al., “Transcriptome characterization and polymorphism detection between subspecies of big sagebrush (Artemisia tridentata),” BMC Genomics 12 (2011): 370, http://www.biomedcentral.com/1471-2164/12/370.