I wanted to work with the ESP-01 module without having to solder jumpers or be too careful while connecting the cables to avoid frying a board. So I get to EAGLE and traced a simple board with a few functions.

The board have an 3.3V LDO Regulator, a RESET and FLASH switches, and a voltage divider to work with 5V communication levels.

The EAGLE files can be found on my blog and the PCB is available on OSH Park.