Nice GUI, plenty of settings, fast startup times, comes with own decoders, plays music and images too. A nice all in one and lightweight package for daily use.
Ranked in these QuestionsQuestion Ranking
Pro Auto add playlist
Automatically adds files with similar name to playlist
Pro Nice working skin engine
In contrast to some other popular players out there, the GOM Player skin engine really works out. Skins on GOM Player feel quite natural and everything is still very responsive. So even skins in use, the whole player doesn't feel bloated.
Pro Allows renaming of files while playing
Something I did not encounter often is the fact, that GOM Player has some magic trick up its sleeve. It mostly allows to rename the currently playing files and sometimes I can even move them. I cannot really tell how that works, but it does (playing from UNC network paths here (ntfs, windows)).
Pro Easy playback control
Whether it's switching audio channels, aspect ratio, playback size. All can be done easily via context menu or keyboard shortcuts or even mouse clicks if configured.
Con Ads and a little bulk
Recent version got a bit bulkier than they were some years ago. If things get to much, use one of the older versions, they play mp4 and mkv just fine. Also needs some firewall tweaking to get rid of occasional ads in the free version.