Why don't more coins release lightweight wallets?

[Bizmark13]

...and which coins currently have lightweight wallets such as Electrum and MultiBit for them?

Part of the reason why people keep their altcoins on exchanges is because it can be a huge hassle to download clients and blockchains for every single coin. Some coins like the CryptoNote coins also have very large blockchains because of the way they're designed.

I know Litecoin has Electrum-LTC and Dogecoin has MultiDoge and Electrum Doge. I think NXT and FIMKrypto also have a lightweight wallet built for them (Mofowallet?). Are there any other examples out there?

[menlatin]

Probably because there is only a handful of devs capable of porting mobile wallets to their coins. And those that are not are typically not willing to spend the money to get one made. Even if they do pay someone to make one, there's no guarantee that it will get done and done properly with adequate support. This space is so small when it comes to reliable devs and so full of scammers and big talkers that sometimes it can be hard to get anything done unless you are a very proficient coder yourself.

[Ducky1]

Startcoin has this: https://startwallet.com/

[jones_]

http://jnxt.org/jay

The jay framework is slowly emerging as an nxt Web wallet framework for the nxt platform.

http://jnxt.org/jayex with a web frontend decentralized exchange in beta and NxtVault android application that interfaces with Jay