Warm up / Tape saturator
If you want that old analog sound and you are on a budget, looks around to find an old reel to reel tape recording. You can have some for less than 300$, i bought mine for 100$. Looks for an old unit from the 60s or 70s. That will warm up your track big time. Better than any emulation or expensive hardware.
If you want to still add more analog sound and warmess, try to find an old amp from the 70s, you should be able to find one very cheap. Or an old analog EQ. It will add warm and color to your track, and you will get the real analog sound for a very reasonnable price.
I personnaly use an old TEAC 2300s, reel to reel tape recorder. And an ADC Sound Shaper one ten-IC. They do magic to color and warm up the sound. I also have
a T1952 but only for compression
I know, i am a little late, but maybe some one will catch up that post.
Have fun and remember, it's not the gear you use that is important, it's how you use it.
Gear:
Virus TI2 Desktop
TEAC 2300s reel to reel tape recorder.
ADC Sound Shaper One Ten-IC EQ
Behringer T1952 Tube Composer
APC-20
BCR2000
Ableton Live 8.2