DOUBLECELL, singlecell's 2nd volume, is an online inclosure of responsive ecologies. Its focus is centred about the themes of dyads, twins, pairs, mates, dualities, diptychs, couplets, dicephalics, siamese formations, symbionts, palindromes, mirror images, binary organisms, host-parasite, predator-prey, and parent-child systems.

DOUBLECELL (2002) brings together systems created by: casey reas D-Cell by Casey Reas christopher fahey Doublecell ecology by Christopher Fahey colony Nanobots by Colony Media daniel brown They Mostly Come at Night, Mostly... by Daniel Brown golan levin • jared schiffman Doublecell Gateway by Jared Schiffman juha huuskonen Bob and Barbara by Juha Huuskonen lia 2_cell by Lia limiteazero 5_clicks by Limiteazero manny tan Tangle by Manny Tan & peter cho Cellblock.2 by Peter Cho. More information about doublecell HERE.

SINGLECELL (2001), precursor to doublecell, is a bestiary of online life-forms reared by a diverse group of computational artists and designers.