From the Celera website:
Celera Assembler is scientific software for biological research. Celera Assembler is a de novo whole-genome shotgun (WGS) DNA sequence assembler. It reconstructs long sequences of genomic DNA from fragmentary data produced by whole-genome shotgun sequencing. Celera Assembler has enabled many advances in genomics, including the first whole genome shotgun sequence of a multi-cellular organism (Myers 2000) and the first diploid sequence of an individual human (Levy 2007). Celera Assembler was developed at Celera Genomics starting in 1999. It was released to SourceForge in 2004 as the wgs-assembler under the GNU General Public License. The pipeline revised for 454 data was named CABOG (Miller 2008).