SPL Memo v3.0.0

In addition to validating a string of UTF-8 encoded characters, the Memo program now:

• verifies that any accounts provided are signers of the transaction
• logs the memo, as well as any verified signer addresses, to the transaction log, so that anyone can easily observe memos and know they were approved by zero or more addresses by inspecting the transaction log from a trusted provider.

SPL Feature Proposal v1.0.0

The SPL Feature Proposal Program provides a workflow for activation of Solana network features through community vote based on validator stake weight.

SPL Associated Token Account v1.0.1

The SPL Associated Token Account program defines the convention and the provides the mechanism for mapping a user wallet address to its associated token accounts

SPL Token v2.0.6

Features:

• Multisig: require a 1x1 pairing of M signers to M multisig keys
• Allows various accounts to be borrowed multiple times in token instructions, which generally enables Account and Mint accounts to serve as their own authority
• Standardized error-case ordering in instruction processing

SPL Token v2.0.3

Features:

• A Mint requires a mint authority on initialization, and tokens must be minted in separate instructions. Once unset, the mint authority can never be reset, fixing the supply
• Token accounts can be frozen and thawed, if a freeze authority is set in the Mint on initialization. Once unset, the freeze authority can never be reset.
• Token, Mint, and Multisig accounts are required to be rent-exempt, to ensure consistency in authorities and a valid supply (now reported in Mint)
• Non-native Accounts can now be closed by the account's close authority, if the token balance is zero
• SetAuthority instruction now supports easy reconfiguration of Mint or Token authorities

SPL Token v1.0.0

An ERC20-like Token program on the Solana blockchain

SPL Memo v1.0.0

A simple program that accepts a string of encoded characters and verifies that it parses.
Currently handles UTF-8.