Third party content is widely used in my maps. Here are links to (most) of them

• TF2 "bulletcrops" pack
http://www.minerality.fr/bulletcropsproject/bulletcrops/

• TF2 construction pack
http://construction.tf2maps.net/

• TF2 props @ tf2maps.net: http://forums.tf2maps.net/downloads.php?do=cat&id=2
> Farm pack (by Schmitz): http://forums.tf2maps.net/downloads.php?do=file&id=250
> Hatstand (by Acumen): http://forums.tf2maps.net/downloads.php?do=file&id=2189
> Chair (by Acumen): http://forums.tf2maps.net/downloads.php?do=file&id=2726
> Tractor (by Acumen): http://forums.tf2maps.net/downloads.php?do=file&id=3072
> Wall boards (by Rexy): http://forums.tf2maps.net/downloads.php?do=file&id=3383
> File cabinets (by Rexy): http://forums.tf2maps.net/downloads.php?do=file&id=3390
> Vending machine (by Rexy): http://forums.tf2maps.net/downloads.php?do=file&id=3687
> Caravan (by Rexy): http://forums.tf2maps.net/downloads.php?do=file&id=3705
> Popcorn cart (by HellJumper777) : http://forums.tf2maps.net/downloads.php?do=file&id=3803
> Haybale (by EArkham): http://forums.tf2maps.net/downloads.php?do=file&id=3897
> Rocking furniture (by Acumen): http://forums.tf2maps.net/downloads.php?do=file&id=4286
> Log bench (by Acumen): http://forums.tf2maps.net/downloads.php?do=file&id=4317
> Wind turbine (by Seba): http://forums.tf2maps.net/downloads.php?do=file&id=4635
> Banyan jungle trees (by EArkham): http://forums.tf2maps.net/downloads.php?do=file&id=4831
> TF2 Police Car (by BrainSample): http://gamebanana.com/tf2/prefabs/1714

• Misc stuff
> Get Out Frog: http://www.garrysmod.org/downloads/?a=view&id=108970
> Rebb's TF2 bed: http://filesmelt.com/dl/tf2_bed.zip (might be broken)

• Special misc stuff
> missing particles? get the PCFs here: http://source.maxofs2d.net/index.php?dir=misc
> tf_hhv_loghouse's skybox is from some TF2 map and is called sky_nightsnow

• Stuff you will not find:
> TF2 fridge prop by Anatoly "Funnycat" Volnov
> Private character models (some will stay unreleased for various reasons, sorry)