Apple IIGS Utilities from the Skunk Works BBS Archive:

ALERTSOUND.SHK  cdev to change your beep sound
AUTO.SHK        PIF to allow you to open a menu by clicking on the name, then click an item
XMASICONS.SHK   Assorted Christmas icons
COMPRESS.SHK    UNIX-compatible compress and uncompress
CONCH.SHK       Conch, a ProDOS shell CDA
CHRONOS21.SHK   Some sort of NDA; maybe an alarm clock or something else related to time
TRASH.DC.SHK    Trash-can icons of some Washington landmarks (including the White House); when you put something in the trash, a mushroom cloud appears in the building's place :-)
DESKCOLOR31.SHK DeskColor v3.1, a cdev that lets you change the background pattern from the default puke-blue to any other color or pattern--or even a picture
DESKPICINIT.SHK GS deskpicture init and a picture to go with it
DICED.SHK       DIcEd (Dave's Icon Editor), an icon editor by Dave Lyons
DISKWTCH310.SHK Disk Witch v3.1.0, CDA/shell-app combo that gives you file utilities under GS/OS or ProDOS 8
DOCVU20.SHK     DOCvu v2.0, a CDA that tells you about all you could possibly want to know about the DOC's operational state
DOS33LAUNCH.SHK Launch DOS 3.3 programs from the Finder
DTUTILS32.SHK   Multi-purpose NDA set
EASYOPEN10.SHK  EasyOpen ver 1.0, a finderextension to alias Sys, S16 and dir files while in finder.  (it only works in finder)
ECP16.040B.SHK  Extended Command Processor-16 (ECP-16) 0.4b, with docs
ECP16.050.SHK   ECP-16 0.5, a hack of 0.4b--S16 executable only
ECP16S.050.SHK  Source code to accompany ECP-050.BXY
FILEPSG.202.SHK File Passage v2.0.2, a file manager
FXTNDA10.SHK    NDA that allows you to use Finder extensions from any desktop program
FINDERICONS.SHK Replacements for some common Finder icons
FNDSND1F.SHK    FinderSounder--a Finder extension that plays an rSound when you double-click on the sound's icon
FTYPESET1.1.SHK Filetype descriptor editor
GSCII23.SHK     Convert any file into an ASCII-only format called BinSCII, and do opposite
HPRT10.SHK      HardPressed RunTime v1.0, a stripped-down version of HardPressed that can only uncompress files and only knows about the LZSS module.  On the plus side, it's freely distributable, and can be used to cram more information into user group mailings, on-disk 
HFS.ICON.SHK    Disk icon that appears when a Mac disk is popped in the drive
HKMENUS.SHK     HKMenus is a utility which lets you navigate through pulldown menus using the keyboard.  Future versions will include hierarchical menus and neat stuff like that.
HPRTDATA.SHK    HPRT demo files--an archive with half a dozen files compressed with HardPressed's LZSS module.  It's got two old Jason Harper demos (FillMaze and Polygonia), Yahtzee, and the ASCII documentation for Moria v4.83.
ICONED.SHK      IconEd, an icon editor
INITFIX.SHK     InitFix 1.2--This program lets you enable and disable inits/da's/cdevs at boot up!!! It installs itself onto prodos and uses a custom text interface to let you select which files you want to enable and disable.
INSTNTREPL.SHK  Instant Reply, a macro utility
JOY.ADJUST.SHK  joystick adjustment utility
JUMBODSK212.SHK JumboDesk, an NDA that lets you create a "virtual desktop" much larger than the usual 640x200
KEYNOTIF11.SHK  KeyNotifier--if you have an extended (IBM-style) keyboard, this cdev will let you configure the Num Lock, Scroll Lock, and Caps Lock lights to serve as disk-activity lights or for some other purposes
LISTPATCH.SHK   INIT that fixes a keyboard-navigation bug in the List Manager
LOTSATOOLS.SHK  Preload more tools to save time when you launch programs
MACTRASH.SHK    Finder trash-can icon set--turns your trash can into a Macintosh
MENUMAST.SHK    NDA to change the color of your menus
MSGCHKR10.SHK   MessageChecker v1.0, a CDA that constantly verifies the integrity of the MessageCenter, one of GS/OS's internal data structures that can sometimes become corrupted
OTHER.DAS.SHK   an assortment of small DAs
ICONS.SHK       an assortment of icons
MISC.INITS.SHK  an assortment of INITs
MGS20.SHK       MultiGS v2.0, a freeware (no mention of 21569$ in the dox, anyway) multitasker (similar in function to Switch-It! and The Manager, but it's non-commercial)
NUKE.NY.2.I.SHK trashcan icons (NY skyline=empty, mushroom cloud=full)
OPENIT11.SHK    OpenIt 1.1, a Finder Extension that allows you to type in a pathname; it acts differently depending on what you typed in the pathname of.
PMPUNZIP20.SHK  PMPUnZIP 2.0--unpacks all archives created by PKZIP (including deflated elements generated by PKZIP 2.04 and friends).  Unlike other GS unzip programs, this one is a desktop app--no shell required!
POINTLE.203.SHK Updater for Pointless 2.x--brings your current copy of Pointless up to v2.0.3
BUFFERS.SHK     Set up a 32K or 64K print buffer for 8-bit and (maybe) shell apps
PROBOOT52.SHK   ProBoot v5.2--pick a boot slot, set system speed, and do other fun stuff when you start your system
QUICKLAUNCH.SHK QuickLaunch, a faster way to get at your programs
REDIT103.SHK    rEdit v1.0.3, an easy to use resource editing tool with some native editors (some kind of Strings, Icon, Version, ToolTable, Bundle).
RESLIN033.SHK   ResLin d0.33 Resource Manipulation Utility
RUNPRO.SHK      RunPro, a set of utilities that let you run 8-bit apps (both ProDOS 8 apps and some non-ProDOS apps) within GS/OS.  (Normally, GS/OS shuts down whenever an 8-bit app is selected from the Finder or other program launcher.)
SCRAPBOOK20.SHK Scrapbook NDA--functions like the Mac's Scrapbook DA
SHTDWNREMND.SHK Shut-Down Reminder, warns you to back up your RAMdisk before quitting
SPACEONDISK.SHK Patch the ProDOS FST to accept spaces in filenames
SWITCHDEMO.SHK  demo of Switch-It!, a multi-application switcher for the IIGS
TEARBAR.SHK     CDA to feed paper in/out of an Imagewriter II to tear the paper
TGESAVER.SHK    Screen save CDA--save any text or graphics screen to a file in /RAM5
MANAGERDEMO.SHK The Manager--a demo version of the much talked about switcher for the IIgs.  Warning: the docs say 2 megs minimum.
UNSHR.SHK       CDA to save the current contents of the SHR screen to a Merlin source-code file
UNZIPGS.SHK     shell command to unpack archives created by PKZIP
UTILLAUNCH.SHK  UtilityLaunch--launch your apps from a file dialog or from a ProSel-like menu
WELCOME40.SHK   Some goodies for customizing your GS--you can change the opening "Welcome to the IIGS" dialog to something else
WELCOMEDIT.SHK  WelcomEdit: change the appearance of the GS/OS startup dialog
WINFLATE121.SHK WinFlate 1.21--reduces the amount of space taken up by windows to reduce desktop clutter.  This version should be compatible with Seven Hills' The Manager in all modes and fixes a memory-corruption bug.
FONTSEL6.SHK    cdev to use fonts to display font names in "Font" menus
YANKIT11.SHK    Unpack ShrinkIt archives from your favorite shell