QtDMM is a DMM (Digital Multi Meter) readout software (for Linux/UNIX and since version 0.8.11 for Mac OS X) including a configurable transient recorder. The transient recorder features manual start, scheduled start (at a given time) and triggered automatic start when given thresholds are reached. It was written for Metex (and compatible like Voltcraft) multimeter and is known to work with various DMM's, here is a partially list;

here a complete list. For more information click here. There is, also, the 2nd version of QtDMM, aka QtDMM2, which will be a GUI for multimeter based on Qt-4.x. The impementation is in an early larval stage. The most important difference between QtDMM and QtDMM2 will be the separation of front- and backend (cdmm) and the ability to handle more than one multimeter at once (even over network). If you want try it click here.