Top 5 nrf51 open source projects

Tinygo
Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
IOS-DFU-Library
OTA DFU Library for Mac and iOS, compatible with nRF5x SoCs
nrf52-IR
Decoding and saving carrier modulated IR signals and sending modulated IR signals using NRF52 SoCs
1-5 of 5 nrf51 projects