Free sharing software for linux

Search engines like Google do a fine job when it comes to search, but they do little to help us organise our past searches, nor do they make it easy for us to share our search experiences with others. This is more than just an inconvenience because very often we waste time re-searching for results that we know we found earlier. And even more often we find ourselves looking for information that one of our friends or colleagues has already found.

Enhancements:

• Added promotion filters that restrict result promotions in Google to results that have been selected numerous times, that have been tagged, or that have been voted up more times than they have been voted down.
• Added positive/negative promotion filters to stak creation so that users can cause URLs with the specified string to always or never be promoted on Google result pages.
• Result site favicons are used to annotate URLs promoted by positive filters (where available).
• Added timeouts which reset to the private "My Searches" stak after prolonged inactivity, and that expire the use of query terms as default tags and vote terms.
• Voting and page sharing have been added to the activity feed
• Share and remove options are greyed out in the stak menu for staks where this should not be possible (e.g. "My Searches").
• Added "Preview" feature via an icon next to results on the Google result list users can now browse through the result pages without leaving the result list.
• Enabled page sharing and preview features for non logged-in users.
• Improved the formatting of the icons inserted next to results on the Google result page so that they don't "jump" when results are moused-over.

Requirements:

• Mozilla Firefox

YACY is a distributed Web crawler and also a caching HTTP/HTTPS proxy. Pages that pass through the proxy are indexed and can be searched using a built-in HTTP server.
YACY peers connect each other and form a P2P-based index exchange network based on distributed hash tables. Explicit web crawls can be done locally or collaboratively, forming a global search and distributed indexing engine for the Web.
YACY also provides URL filtering with blacklist sharing among other proxy peers, individual Web and servlet page hosting, a file sharing zone, and a database engine.
Main features:
- Search your own or the global index
- Crawl your own pages or start distributed crawling
- Run your peer to support other YaCy crawlers
- Provide Information on your peer using the built-in http-server, file-sharing zone and wiki
- Built-in caching http proxy
- Indexing benefits from the proxy cache; private information is not stored or indexed
- Usage of the proxy is not a requisite for web indexing, but it enables you to access the new top-level-domains .yacy
- Filter unwanted content like ad- or spyware; share your web-blacklist with other peers
- Easy installation! No additional database required!
- No central server!
- GPLed, freeware
Enhancements:
- An auto-updater and support for multiple search networks have been added, and the option to index intranet sites in separated networks has been enabled.
- Some interface functions have also been enhanced.

Webmin is a web-based interface for system administration for Unix.

Using any browser that supports tables and forms, you can setup user accounts, internet services, DNS, file sharing and so on.

Libgenerics is a c++ library that provides object services to analyze class type at runtime sharing the definitions between dynamic modules.
It provides serialization services abstraction too. The project is an absolute generic library.
Enhancements:
- autotool layer added

pro-search is a crawler for FTP servers, SMB shares, HTTP servers, and DC++ networks.