I've had a look at the linked photographs and... wow, that's a lot of stuff.
If you plan on reconstructing the sets, remember that you can search for instructions given a set number.
From he above picture I can identify:
- 7156-1 "Corroder" (which is not bionicle but rather Hero Factory) (searched for lime bionicle legs)
- 8696-1 "Bitil" (searched for yellow bionicle legs with 3 technic holes)
- 8695-1 "Gorast" (just by combing through list of bionicle sets)
- 8622-1 "Nidhiki" (dark green 7+3 liftarm)
- 8727-1 "Inika Toa Jaller " (pearl gold bionicle chest)
- 8983-1 "Vorox " (tan bionicle leg)
- Bits of 8533-1 "Gali" (medium blue bionicle parts)
- Some unknown Mega Blocks blue&white robot/figure at toe bottom right. Note the "mega blocks" markings in the center of groups of four studs.
- Yellow parts possible part of aforementioned 8696-1 "Bitil"
- Lots of unknown parts
- Green technic connector with two ball sockets, from one of four possible sets. I'm guessing 8914-1 "Toa Mahri Hahli " based on the attached dark blue parts, and a mask from a different photograph.
- Clawed feet from aforementioned 8983-1 "Vorox ", even though the colour doesn't seem to match in the photograph (due to white balance, perhaps?)
- 8979-1 "Malum" (red & "marbled bright orange" chest, bottom center)
- 8567-1 "Lewa Nuva" (lime legs, bottom left)
- 8570-1 "Gali Nuva" (medium blue legs, between top right and middle right)
- 8591-1 "Vorak" (spikes on black bionicle back cover with groove, just above center)
- 8589-1 "Lerahk" (green back cover with groove; note spikes through groove are switched)
- 8590-1 "Guurahk" (blue back cover with groove; note spikes through groove back are switched)
- 8592-1 "Turahk" (back blades with holes, inserted in the blue back cover)
- Lots of other unidentified parts
- 8568-1 "Potahu Nuva" (tan legs connected to brown parts, above revolver)
- 8911-1 "Toa Mahi Jaller" (6-shot revolver-like part, connected to red&orange parts; also mask appears in later photograph)
- Transparent wings with hexagon-like pattern from aforementioned 8695-1 "Gorast" (in the pile at the very top)
- Lots of other unidentified parts
- 8561-1 "Nuhvok" (via trans-neon-green teeth)
- 8615-1 "Vahki Bordakh" (disk launcher with trans-orange head connector)
- 8685-1 "Phantoka" (black & grey projectile launcher paired with a mask from a later photograph)
- 8913-1 "Toa Mahri Nuparu" (revolver projectile launcher and mask from later photograph)
- 8925-1 "Barraki Deepsea Patrol" (6x11 assembly at top, with 6x10 + 1x6 black plates, consistent with black whip from later photograph)
- Aforementioned 8914-1 "Toa Mahri Hahli " (remaining revolver projectile launcher)
- Other unidentified parts
- 8747-1 "Visorak Suukorak"
- The black head appears in two sets. I'm gonna take a wild guess and say 8919-1 "Mantax"
- 8743-1 "Visorak Boggarak"
That's all I can identify for now. You might want to rebuild all known sets, and come back here later with the remaining parts for a second round.