A few weeks ago, there has been a staggering lack of infrastructure options. But roughly 3 weeks after that things seem to have really changed.
There are now a dozen of voting portals available. The list below has been compiled by members of EOS groups, i just copied it in here for reference, as important info on telegram perishes much too quickly.
I have only tried a few of them via test-nets, bleak summary: Until recently none let me effectively vote. The best - and closest to the thing - where in my view: The EOS portal and what EOSIO.sg delivers. Especially the latter hasn't much backup, but looks really good from a usability view.
Anyhow, this is in no way a security assessement, @EOSNEWYORK has a rather limited selection of voting portals, the most important advice these days:
Don't do anything until you have confirmation of 5 of your blockproducers who you trust, that say the mainnet ist good.
So this is the list:
Scatellet by Scatter (nsjames)
http://get-scatter.com
Telegram: https://t.me/Scatter
https://github.com/EOSEssentials/Scattellet
EOS Wallet Pro
https://eoswalletpro.com
Telegram: https://t.me/eoswalletpro
EOS Nation's Mobile Wallet/Voting Portal
https://steemit.com/eos/@eosnation/eos-wallet-voting-mobile-app
Telegram: https://t.me/EOSNation
EOS Tribe's Wallet
https://www.ses.network
Telegram: https://t.me/EOSTribe
EOS Canada's Wallet and Voting Portal
https://github.com/eoscanada/eosc
Telegram: https://t.me/EOSCanada
Exodus Wallet EOS main-net "planned":
https://support.exodus.io/article/96-exodus-wallet-roadmap
ColdEOS (offline trx signing)
https://github.com/grock999/coldeos
EOS Portal's Voting Portal
http://eosportal.io
Telegram: https://t.me/EOSPortal
EOSIOSG's Voting Portal
http://vote.eosio.sg
Telegram: https://t.me/eosiosg
EOSoul's Voting Portal
http://portal.eoseoul.io/
How to use (in English) : https://steemit.com/en/@eoseoul/vote-how-to-vote-using-scatter
Telegram: https://t.me/eoseoul
Tokenika Secure EOS Offline Voting Portal
https://github.com/tokenika/secure-bp-voting
https://tokenika.io
Liquid EOS's Voting Portal (from Bancor)
http://vote.liquideos.com
Telegram: https://t.me/BPLiquidEOS
Liberty Block's Voting Portal
http://vote.libertyblock.io
Telegram: https://t.me/eoslibertyblock
Bitfinex expects to release a voting portal soon.
https://github.com/bitfinexcom/bip/blob/master/proposals/001.md
MEET.ONE, EOSIO.SG, EOS Cannon, EOS Nation
Pomelo(wallet+voting) - https://steemit.com/eos/@eosnation/eos-wallet-voting-mobile-app
OracleChain, PocketEOS (wallet+voting)
Andorid - https://github.com/OracleChain/PocketEOS-Android
IOS - https://github.com/OracleChain/PocketEOS-IOS
Greymass
Everipedia
https://github.com/EveripediaNetwork/eos-voting
###EOSPhere
https://steemit.com/eos/@eosphere/eos-voter-eos-voting-portal-with-scatter
Bitfinex
https://support.bitfinex.com/hc/en-us/articles/360005324573-EOS-Block-Producer-Ballot