what plugins for master?

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so i making a lofi song what plugins do you suggest me for mastering the song?
Actually, the things you need to master a song are these:

- An equalizer
- A compressor, more usually a limiter, unless you want to add some multiband compression
- A saturator
- A stereoimager/widener
- A spectrum analyzer

So a great mastering suite that it was a payplugin and now it's free, and so it's a must have, is Izotope Ozone Elements 8, which includes an equalizer, a maximizer and a stereo imager. You can get it for example on pluginboutique.com.

If you want some other advices, obviously the LMMS native graphical equalizer is perfect for the work, as a limiter i suggest the Classic Master Limiter vst, for saturator use FerricTDS which is great as well, and for stereo widening you can use Izotope one which is the standalone version of the one included in ozone elements or Wider vst which is great as well.
For the spectrum equalizer i highly suggest atm Voxengo SPAN, which works perfectly, but in later releases LMMS will have its native one, that will have also a waterfall feature, you can see it here (https://github.com/LMMS/lmms/pull/4950), as well as it'll have a native vectorscope, which you can see here (https://github.com/LMMS/lmms/pull/5328).

You could also need a clipper for slight distortion or to use instead of a limiter, i suggest GClip, which seems to get the work done well.

Also you could need a mastering compressor, and here i suggest TDR Kotelnikov, or Sonic Anomaly Quadracom, which is really good.

Speaking of Multiband compression, OTT is certainly great, but not suited for mastering imo. I instead would use GranComp3.
Not to forgot, another great compression plugin is Max1.

I can't think of anything else you would need. Just try them and choose the ones that best suits your style.

P.S: This looks really good for metering https://www.tb-software.com/TBProAudio/mvmeter2.html