There are a lot of them. Metol only formulations give soft results, like Kodak Selectol Soft. Amidol developers are short lived, energetic, cold tone. Catechol developers are warm tone. Glycin developers can be either warm or neutral tone and usually have good keeping propertied. here is a short list of various formulas (far from exhaustive) for you to look at:
Agfa 105 soft working paper developer
Water (52C) 750 ml
Metol 3 g
Sodium sulfite (anh) 15 g
Sodium carbonate (mono) 15 g
Potassium bromide 400 mg
WTM 1 l
Use undiluted. Develop 1-1/2 minutes.
Ansco 113 cold tone paper developer
Water 750 ml
Amidol 6.6 g
Sodium sulfite (anh) 44 g
Potasssium bromide 500 mg
WTM 1 l
Mix immediately before use.
Do not dilute. Develop 2 minutes, followed by citric acid stop bath.
May be diluted up to 1:20 for progressively softer results.
Catechol warm tone paper developer
Water (43C) 700 ml
Pyrocatechin 4 g
Potassium carbonate 45 g
Potassium bromide 400 mg
WTM 1 l
Use full strength at 38C with greatly reduced exposure. After development, cool the print in a water bath.
DeSmidt Print developer
Water 1500 ml
Phenidone 200 mg
(4 ml of 5% solution in methanol)
Ascorbic acid 10 g
Sodium sulfite 30 g
Sodium carbonate 50 g
Benzotriazole (2%) 25 ml
WTM 2 l
Edwal 102 paper developer (Formulary 102)
Water (52C) 900 ml
Sodium sulfite 80 g
Sodium phosphate (tri-basic) 120 g
Glycin 25 g
Potassium bromide 3 g
WTM 1 l
Dilute 1:3 for slower papers, 1:4 for faster papers. Develop 2 - 6 minutes. (No image will appear in the first minute or so.) Use a non-hardening fixer.
Gives neutral black tones. If desired, potassium bromide (10 percent solution) may be added as needed.
Gevaert GD-11 warm tone paper developer
Sodium sulfite 28.4 g
Glycin 14.2 g
Potassium carbonate 74.4 g
Potassium bromide 7 g
WTM 1 l
Variation in tone may be obtained by changing the bromide concentration, time of development, and temperature. The longer the exposure and shorter the development, the warmer the tone.
Glycin paper developer
Gives black tones with bromide papers, warm black to sepia tones on chloride and
chlorobromide papers.
Water 1 l
Sodium sulfite 100 g
Trisodium phosphate 125 g
Glycin 25 g
Potassium bromide 1-3 g
Dilute 1:3 for chloride and chlorobromide papers, 1:4 for bromide papers. Develop 2 to 3 minutes.
Note: A wide range of effects is possible by varying the dilution, exposure, and developing time.