We present LoRaMesher, a communication library to build LoRa mesh networks. LoRaMesher interconnects geographically spread IoT devices through a LoRa mesh network. For the communication, the library implements a proactive distance vector routing protocol. Using LoRaMesher, an IoT application running on a node can send and receive data packets to and from other nodes in the LoRa mesh network. LoRaMesher has been tested on embedded boards featuring an ESP32 microcontroller and a LoRa radio. Using LoRaMesher, nodes do not connect to a LoRaWAN gateway, but among themselves. This allows new, distributed applications solely built upon tiny IoT nodes. Main git repository of LoRaMesher library: https://github.com/LoRaMesher/LoRaMesher. Operational demonstrator: https://dsg.ac.upc.edu/loraupc/index.php