As well as the above suggestions, here are a few more.
Assembled bolsters and butt caps are nice in silver....especially with file work or engraving.
On Japanese blades, silver (and its Japanese cousins like shibuichi) is commonly used to make the koshirae - seppa, tsuba, menuki, fuchi, and kashira.
Other silver ideas:
1) Dome a silver coin in a dapping block and make a stud or frog button for a sheath. The older the better for the coin. 100+ year old coins in circulated condition can be had for almost the scrap value.
2) Slightly dome a coin and make a butt cap for a take-down bowie style knife.
3) Inlay an escutcheon and engrave it with any of these - the owners name, a date, your makers mark, or an engraved scene.
4) Make sterling throat/collar and tip segments for a fancy sheath....or a full frame sheath with fancy leather inlay ( like same'/rayskin or ostrich leg). Putting a ball on the tip is a classy look.
5) Inlay shaped pieces of silver. I made a folder for a friend who uses a smiling pig face as his BBQ shop's logo. I cut out the shape and inlaid it in the folder scales. A few graver strokes and it was done.
6) Saw out an old quarter or half-dollar ( 3/0-5/0 saw blades works well) leaving only the center character and the rim. Use these as dangles from the thongs of a sheath, or on a handle thong. Many other coins are good for this. One popular coin is the Bahamian half dollar with the jumping marlin. The eagle on a quarter is good, too. Foreign coins for foreign style knives/sheaths are a nice touch.
7) Make a lattice pattern of your choice using silver square wire ( triangle shapes are best) and inlay the pattern with crushed turquoise, or fitted pieces of MOP. For the max effect in this you can inlay opal or gold quartz in a California Bowie handle. A gold framed inlay of gold quartz can add thousands to the value of a small damascus bowie.
Attached is a Sgian Dubh in mammoth ivory ( black and white) with silver fittings.