Last update 04 Sep 2017: Litecoin got new P2SH which most exchanges and mainstream wallets don't support yet.
Last update 17 Aug 2017: ...even after yesterdays security update of the firmware.
Last update 20 Jul 2017: DASH wallet was released just yesterday to the Apple App Store.
Last update 15 Jun 2017: The likelihood of Monero getting its first hardware wallet is growing - the CTO of Ledger wallet says the next step is providing ETA.
Last update 12 Jun 2017: Jaxx wallet has a serious vulnerability that is being worked on - but at the moment is there.
Last update 23 Mar 2017: Monero CLI wallet is the only reasonable and well tested option we have to store larger amount of XMR although the new beta graphical wallet (GUI) is out too. Finally something user-friendly.
Last update 18 Jun 2017: The promises of upcoming Monero hardware wallets are for now just promises.
Last update 03 Mar 2017: Trezor now added native support for DASH and ZCASH - and explained what the altcoin needs to get supported (looking at you, Monero).
Last update 22 May 2017: Where to store altcoins? See a list of altcoin wallets, from web based wallets to best hardware wallets.