Flashblock: As guenter said this is included with K-Meleon releases.
snap links: I think that this extension can be adapted or emulated with K-Meleon macros. But i don't sure because nobody tried it.
save images: I think that this extension can be adapted or emulated with K-Meleon macros and some external tool.
rip advanced: I think this extension isn't adapted for K-Meleon. But can be simulated using AdBlockplus, Noscript, and CSS ad-blocking.
K-Meleon in Spanish