from http://www.busybox.net/downloads/BusyBox.html

[, [[, addgroup, adduser, adjtimex, ar, arp, arping, ash, awk,
basename, bbconfig, bbsh, bunzip2, busybox, bzcat, cal, cat,
catv, chattr, chcon, chgrp, chmod, chown, chpasswd, chpst,
chroot, chrt, chvt, cksum, clear, cmp, comm, cp, cpio, crond,
crontab, cryptpw, cut, date, dc, dd, deallocvt, delgroup,
deluser, devfsd, df, dhcprelay, diff, dirname, dmesg, dnsd,
dos2unix, dpkg, dpkg_deb, du, dumpkmap, dumpleases, e2fsck, echo,
ed, eject, env, envdir, envuidgid, ether_wake, expand, expr,
fakeidentd, false, fbset, fdflush, fdformat, fdisk, find, fold,
free, freeramdisk, fsck, fsck_minix, ftpget, ftpput, fuser,
getenforce, getopt, getsebool, getty, grep, gunzip, gzip, halt,
hdparm, head, hexdump, hostid, hostname, httpd, hwclock, id,
ifconfig, ifdown, ifup, inetd, init, insmod, install, ip, ipaddr,
ipcalc, ipcrm, ipcs, iplink, iproute, iprule, iptunnel, kill,
killall, killall5, klogd, lash, last, length, less, ln,
load_policy, loadfont, loadkmap, logger, login, logname, logread,
losetup, ls, lsattr, lsmod, lzmacat, makedevs, matchpathcon,
md5sum, mdev, mesg, microcom, mkdir, mke2fs, mkfifo, mkfs_minix,
mknod, mkswap, mktemp, modprobe, more, mount, mountpoint, mt, mv,
nameif, nc, netstat, nice, nmeter, nohup, nslookup, od, openvt,
passwd, patch, pgrep, pidof, ping, ping6, pivot_root, pkill,
poweroff, printenv, printf, ps, pscan, pwd, raidautorun, rdate,
readahead, readlink, readprofile, realpath, reboot, renice,
reset, resize, restorecon, rm, rmdir, rmmod, route, rpm,
rpm2cpio, run_parts, runcon, runlevel, runsv, runsvdir, rx, sed,
selinuxenabled, seq, setarch, setconsole, setenforce, setfiles,
setkeycodes, setlogcons, setsid, setuidgid, sha1sum, slattach,
sleep, softlimit, sort, split, start_stop_daemon, stat, strings,
stty, su, sulogin, sum, sv, svlogd, swapoff, swapon, switch_root,
sync, sysctl, syslogd, tail, tar, taskset, tcpsvd, tee, telnet,
telnetd, test, tftp, time, top, touch, tr, traceroute, true, tty,
ttysize, tune2fs, udhcpc, udhcpd, udpsvd, umount, uname,
uncompress, unexpand, uniq, unix2dos, unlzma, unzip, uptime,
usleep, uudecode, uuencode, vconfig, vi, vlock, watch, watchdog,
wc, wget, which, who, whoami, xargs, yes, zcat, zcip

and here's my still broken OS2007 package if you want to look at the structure (includes most but not all busybox apps)

EDIT: PACKAGE LINK DELETED - SEE http://garage.maemo.org/projects/busybox-test for source and binaries