If you don't develop, test or translate the KSP mods, then you may stop reading now. These mods have no value for a regular KSP player.
For those who do develop or translate the mods, some of these mods may have some value:
KSPDev LogConsole. A mod that intercepts stock game logging output and presents it a bit more friendly. It also can persist it to disk so what you don't loose logs from the previous runs. Also, logs are persisted into three files: INFO, WARNING, and ERROR (configur