Radio amateurs use at least five different and incompatible amateur radio digital voice modes on the VHF/UHF bands, D-STAR, Motorola's DMR, dPMR, Yaesu System Fusion C4FM and FreeDV
Of those D-STAR, DMR and C4FM have widespread repeater networks and there is currently one dPMR repeater GB7RR.
Yaesu supply the DR-1XE dual band repeater which can operate in both Digital SystemFusion (C4FM) mode and the traditional Analogue FM mode. It features an Automatic Mode Selection function.
FreeDV was initially developed for HF but is now being used at VHF as well. It is a free software solution for digital voice making use of your PC's soundcard, see
Maps showing the D-STAR, DMR and C4FM repeaters are available on the UK Repeater website.
FreeDV - http://freedv.org/
D-STAR Repeater map - http://www.ukrepeater.net/d-star.htm
DMR Repeater Map - http://www.ukrepeater.net/dmr.htm
Yaesu System Fusion C4FM Repeater Map - http://www.ukrepeater.net/fusion.htm