The Sims
I have found a new trick on the sims: If you hold alt and shift, then while holding the two move the mouse, a box with information will come up. (Only tested to work on Livin' Large, must be in a house)

The Sims

Open Cheat Screen
Press [Ctrl] + [Shift] + C during game play to display a
prompt in the upper left corner of the screen.

Note:, enter [Exclamation point] at the prompt to repeat
       the last cheat entered.

Enter a [Semi-colon] between codes to enter multiple codes at the same time.

Result                                                   Code
1000 Simoleons                                          - klapaucius   

Add new family history stat to the current  
family                                                  - hist_add  

Appends the route destination list to AllRoutes.txt  
every time a route is found                             - write_destlist  

Architecture tools automatically set the level as  
needed                                                  - auto_level  

Automatically import and load indicated FAM file        - import <FAM file>  

Automatically load indicated house, no questions  
asked                                                   - house <house number>  

Check and fix required lot objects                      - prepare_lot   

Completely flush app to VM file when running Windows NT - flush  

Crash game                                              - crash  

Create moat or streams                                  - water_tool   

Create shrunk_text_#.bmp files                          - shrink_text <font_size> <text>   

Create-a-character mode                                 - edit_char   

Display personality and interests                       - interests   

Draw all animation frames disabled                      - draw_all_frames off   

Draw all animation frames enabled                       - draw_all_frames on   

Draw colored dots at each person's origin               - draw_origins  

Dump entire memory to core_dump_[date:time].txt         - core_dump  

Dump selected person's most recent list of scored  
interactions to a file                                  - dump_happy  

Dump selected person's motive contribution curve to a  
file                                                    - dump_mc  

Enable debug flag to show outcome choice dialogs for  
social interactions                                     - debug_social  

End sim logging                                         - sim_log end    

Execute "file.cht" file as a list of cheats             - cht <filename>  

Floorable grid disabled                                 - draw_floorable off   

Floorable grid enabled                                  - draw_floorable on   

Force an assert for testing                             - assert   

Log animations in the event log window                  - log_animations  

Map editor disabled                                     - map_edit off   

Map editor enabled                                      - map_edit on   

Move any object                                         - move_objects   

No tutorial object generation when tutorial house is  
loaded                                                  - tutorial off  

Prevent web browser crashes                             - browser_failsafe   

Preview animations disabled                             - preview_anims off   

Preview animations enabled                              - preview_anims on   

Programmer stats                                        - tile_info   

Quit game                                               - quit  

Read in behavior tuning constants from Tuning.txt       - #import  

Rebuilds entire control panel/UCP from scratch          - rebuild_cp  

Refresh the BMP_ resources for all people whose  
IFF files are writable                                  - refresh_faces  

Rematch dependent textures and regenerate  
bitmaps for all user characters                         - refresh_textures  

Restore tutorial                                        - restore_tut   

Rotate camera                                           - rotation <0-3>   

Routing debug balloons disabled                         - route_balloons off   

Routing debug balloons enabled                          - route_balloons on   

Run series of random operations on unhoused  
families                                                - fam_test <opcount>  

Save currently loaded house                             - save   

Save family history file                                - history   

Say "plugh"                                             - plugh   

Say "porntipsguzzardo"                                  - porntipsguzzardo   

Say "xyzzy"                                             - xyzzy   

Selected person's path displayed                        - draw_routes on   

Selected person's path hidden                           - draw_routes off   

Set event logging mask                                  - log_mask   

Set free thinking level                                 - autonomy <1-100>   

Set game speed                                          - sim_speed <-1000-1000>   

Set grass change value                                  - edit_grass <number>:   

Set grass growth                                        - grow_grass <0-150>   

Set lot size                                            - lot_size <number>   

Set maximum milliseconds to allow simulator             - sim_limit <milliseconds>   

Set sim speed                                           - sim_speed <-1000 - 1000>   

Set time of day                                         - set_hour <1-24>   

Set z offset for thought                                - bubbles bubble_tweak <z offset value>   

Sets the neighborhood directory to the path             - <directory path>  

Sets up the borders of the lot with non-editable flag.   

Sets whether menu items appear for in use objects       - allow_inuse  

Show memory view window in debug builds of the game     - memview  

Start sim logging                                       - sim_log begin   

Swap the two house files and updates families           - swap_houses <house
number> <house number>   

Ticks disabled                                          - sweep off   

Ticks enabled                                           - sweep on   

Tile information displayed                              - tile_info on   

Tile information hidden                                 - tile_info off   

Toggle allowing visitors to be controlled using the  
keyboard                                                - visitor_control  

Toggle assets report                                    - report_assets   

Toggle automatic object reset feature                   - auto_reset  

Toggle calls to PeekMessage within sim loop             - sim_peek  

Toggle camera mode                                      - cam_mode   

Toggle display of unavailable interactions in person  
control menus                                           - all_menus  

Toggle music                                            - music   

Toggle object compression in save file                  - obj_comp  

Toggle quaternion transformations                       - quats   

Toggle sound log window                                 - sound_log   

Toggle sounds                                           - sound   

Toggle web page creation                                - html   

Total reload of people skeletons, animations, suits  
and skins                                               - reload_people  

Trigger sound event                                     - soundevent   

Write out an RTE file every time a route is found       - write_routes  

Write out behavior tuning constants to Tuning.txt       - #export  

Quick money:
Enable cheat mode and enter the klapaucius code. Display the cheat  
prompt again and type  
(up to sixty total commands may be entered).
Magic garbage bag:
The following trick saves the time needed to take the garbage to  
the street. Buy the 30 simolian trash can. Order your Sim to empty  
it, then cancel the order just as they remove the bag from the can.  
Then, order them to pick up the mess that they just created.  
Your Sim will return the full bag to an empty can. Repeat this  
each time it fills and trash will never have be brought outside again.  
Less bills:
Keep an unpaid bill until the mailman delivers the next set of  
bills. Pay the original bill when your mailbox is filled with  
the next set of bills. This should cause the bills inside the  
mailbox to disappear.
7000+ Simoleons:  
Enter the "1000 Simoleons" cheat, then type "!;!;!;!;!;!;!" at  
the command prompt.  
Before jumping into the action, take the time to create  
a neighborhood filled with Sims. This will make it easier  
for your Sims to make friends later in the game.  
In the early going, fight the temptation to buy a lot of  
big-ticket items. Instead, save your money and buy only  
the bare necessities.  
Before getting a job, make a couple of friends and try to  
increase some of your work attributes. This way, once you  
get a job, you'll move up the ladder a bit faster.