Due the some issue Bifrost EOS Cross-chain Competition will be postponed at undefined time.
#Bifrost

Concordium project announced the start of incentivized testnet from October 15th to 26th of November. Participants will be able to earn rewards for performing some challenges.
#Concordium

Wanchain was launched open testnet. Approx duration - one month. Node runners may get up to 900 WAN (~ $230 for now) coins for node.
#Wanchain

Decentralised Ethereum POS network Rocket Pool launched beta testnet v.2.5. Rewards pool 10000 RPL tokens.
#Rocketpool

Bitsong incentivized testnet will start in the closest time. For getting yourself to waiting list, you need generate genesis transaction and make pull request to git repositorium no later than October 13th.
#Bitsong

Dfinance announced incentivized testnet, which planned to start at October 15th. Testnet will not only give rewards in real XFI, but also require real XFI to run validators, stake, or provide liquidity.
#Dfinance

Concordium Incentivized Testnet 3 was launched today, it will last 6 weeks. Participants need to complete various challenges and submit results to Github.
#Concordium

Sentinel incentivised testnet ended for validators. Now you can stop your nodes. Rewards will be calculated with some nuances and will pay after the end of all campaign.
The last part of testnet just for bug finders. It's extended until November 17th 2020.
#Sentinel

The Fetch.ai incentivized testnet will be held from October to February.
The first phase for application testers - from 22 October to the end of November.
The second phase for node operators - end of November to end of January.
The third phase for oracle developers - end of January to mid-February.
#Fetch

The second part of HOPR incentivized testnet, named Basòdino, will start tomorrow 21 October at 13:00 UTC and will run until 4 November. Prize fund 200K HOPR for top 200 participants.
#HOPR

The first part of incentivised action from Fetch started. But for participation in this Agent World 1 (AW-1) you need to stake some real FET tokens.
#Fetch

Crust Network incentivized testnet “Profit Ark” will stat in the middle of November and last to early December. This action requires strong hardware: Intel processor with SGX support, 8Gb RAM and huge HD capacity.
#Crust

IRISnet’s DeFi and interchain Testnet Bifrost has launched Phase-1 on October 19th. Incentives are awarded for completing various blockchain tasks.
#IRIS

Noia notified that incentivized nodes program is over in next Monday. All rewards will be paid. The new node program will be announced later.
#Noia

Bifrost Asgard CC3 testnet is closed today. Now they start to check (?) participants, whatever it means. This process will take up to two weeks.
#Bifrost

Yet another phase of HOPR testnet is ended. New stage Basòdino v2 will start on next Monday 09 November.

November 23 will be launch incentivized part of Phala Network testnet Vendetta for one month. SGX supported CPU and motherboard and also some amount of ERC20 PHA is required for participation.
#Phala

Phase 3 of the INT Chain 4.0 ‘Titans’ testnet will start at block 500000 (approx. tomorrow) and ends at block 1000000 (approx. after 30 days). Prize fund 500k INT (~5k USD). Limited to 100 validator nodes.
#INT

Poseidon QLauncher v1.0 testnet will end November 21. The next stage v2.0 will start after that. If you are willing to provide Linux devices for this test, you need to fill out the registration form.
https://docs.google.com/forms/d/e/1FAIpQLSduc_pvvxaaKoKXONMACr1kQck0m7w_H8F0DxnBPOXEHbqpew/viewform
#Poseidon

Solana announced the 10 Stage of their testnet Tour de Sol, which will be held from 1 to 28 December. If you not participated in previous stages, you need to register before 27 November.
#Solana

The Akashian Challenge Phase 3 will launch on Monday 30 November and run for two weeks. Prize fund 500k AKT (~250k USD). KYC required.
#Akash