This represents mostly Swap Bot stuff. Three postcards were to send a poem to someone, the lower right card and the Glamour Girl card were for Post-Crossing and then there was a SwapBot letter talking about my mother (for a swap called "Appreciation of Mothers") and then a regular pen pal letter.
(BTW, note the themed envelope in the upper left, with a homemade frog card using a Kermit stamp.)
Incoming were two post cards.
The one on the left is from the Netherlands, the one on the right from New Zealand.