Edit: Updated 26 May 2015

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.

SFR Algo Healthcheck
Groestl, Sha and Blake are regularly generating blocks and in good health as they have active regular miners.
Scrypt had generated barely any blocks since the 26 April 2015, due to high difficulty and not enough miners. Effort was made as of 20 May 2015 to start mining Scrypt again, and several blocks were found bringing the difficulty back down. Now the profit switcher at Hamsterpool occasionally mines SFR when the difficulty goes too low, which is creating a volatile difficulty level. Below about difficulty level 6, about 20-30 miners on the profit switching pool start mining on Scrypt, and push the difficulty up way high, before all leaving again. Generally though Scrypt is looking better now, as at least we are finding blocks on an irregular schedule, rather than none at all.
x11 has no working pools that I can find, and therefore apparently no miners, and the difficulty is probably too high to solo mine. We need a new X11 pool so we can start mining again and bring the difficulty down to a more appropriate level. No new X11 blocks are being generated at present.

The great strength of multi-algo coins, is that that despite 2 algorithms being in poor health, 3 have been in continuous 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.

Working Pools

X11
No known pools!
Please try solomining or create a pool!

SCRYPT
Semi-active pool: https://hamsterpool.com/index.php?page=statistics&action=pool&coin=sfr_scrypt
This is a profit switching pool, and therefore doesn't always have miners. You can still use it as a dedicated SFR pool by pointing to port 3052. Solo miners also compete with this pool.

GROESTL
Inactive pool: https://www.miners-pool.eu/#!/pools/saffroncoin-groestl
No one uses the Groestl pool very often, but it is working if you want to give it a go. The difficulty is low, and the algo is being supported by solo miners even when the pool is dead.

SHA-256D
Active pool: http://ispace.co.uk/coindetails/?coin=sfr
Active pool: https://hamsterpool.com/index.php?page=statistics&action=pool&coin=sfr_sha256
Two competing pools, both finding blocks. Also competing with solo miners.

BLAKE256
Active pool: https://www.miners-pool.eu/#!/pools/saffroncoin
This pool finds all the Blake blocks at the moment.

Mining Rewards
The current block reward is 21 SFR. Each algo is targeted to generate a block every 450 seconds. Each algo therefore can produce 4032 coins per day, for 20160 total new coins a day across all 5 algos. The actual amount of new coins a day is less than this, as not all algos, particularly X11, are being mined. The true number of new coins a day is between 12-16k a day, depending on Scrypt blocks found.