I decided to compile a list of pools still in operation for the 5 algorithms, and on the correct blockchain, as the OP is a mess of dead links, and bad pools. All pools below are working, some have miners, and some are abandoned, but still working if you wanted to mine there (most algorithms can be solo mined effectively at present).
At the moment, Groestl, Sha and Blake are regularly producing blocks and in good health as they have active miners. X11 and Scrypt are struggling to find blocks as the difficulty is too high to easily solo mine, and no pools are actively mining on those algos at present. For Scrypt there is at least a working pool which no one is using, but unfortunately for X11 I can't even find a single working pool. This is actually the
great strength of multi-algo coins, that despite 2 algorithms being in poor health, 3 are in good health, meaning the coin still functions perfectly. Multi-algo coins have always been under appreciated, and Saffroncoin is probably the best one out there, despite the lack of progress from the dev in recent months and a low price, it is still fundamentally a solid, well developed coin.
X11No known pools!SCRYPTNo active miners:https://hamsterpool.com/index.php?page=statistics&action=pool&coin=sfr_scryptGROESTLNo active miners:https://www.miners-pool.eu/#!/pools/saffroncoin-groestlDespite the lack of an active pool, Groestl algo is still in good health, presumably from solo miners.
SHA-256DActive miners:http://ispace.co.uk/coindetails/?coin=sfrhttps://hamsterpool.com/index.php?page=statistics&action=pool&coin=sfr_sha256BLAKE256Active miners:https://www.miners-pool.eu/#!/pools/saffroncoinIf you know any more pools which are still working, let me know so I can update the above.